diff --git a/internal/proto/query_coord.proto b/internal/proto/query_coord.proto
index decddc1fdc..324d1f5260 100644
--- a/internal/proto/query_coord.proto
+++ b/internal/proto/query_coord.proto
@@ -323,6 +323,8 @@ message LoadBalanceRequest {
   common.MsgBase base = 1;
   repeated int64 source_nodeIDs = 2;
   TriggerCondition balance_reason = 3;
+  repeated int64 dst_nodeIDs = 4;
+  repeated int64 sealed_segmentIDs = 5;
 }
 
 //---------------- common query proto -----------------
diff --git a/internal/proto/querypb/query_coord.pb.go b/internal/proto/querypb/query_coord.pb.go
index 73106fd21f..bf7fca0d62 100644
--- a/internal/proto/querypb/query_coord.pb.go
+++ b/internal/proto/querypb/query_coord.pb.go
@@ -2109,6 +2109,8 @@ type LoadBalanceRequest struct {
 	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
 	SourceNodeIDs        []int64           `protobuf:"varint,2,rep,packed,name=source_nodeIDs,json=sourceNodeIDs,proto3" json:"source_nodeIDs,omitempty"`
 	BalanceReason        TriggerCondition  `protobuf:"varint,3,opt,name=balance_reason,json=balanceReason,proto3,enum=milvus.proto.query.TriggerCondition" json:"balance_reason,omitempty"`
+	DstNodeIDs           []int64           `protobuf:"varint,4,rep,packed,name=dst_nodeIDs,json=dstNodeIDs,proto3" json:"dst_nodeIDs,omitempty"`
+	SealedSegmentIDs     []int64           `protobuf:"varint,5,rep,packed,name=sealed_segmentIDs,json=sealedSegmentIDs,proto3" json:"sealed_segmentIDs,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
 	XXX_unrecognized     []byte            `json:"-"`
 	XXX_sizecache        int32             `json:"-"`
@@ -2160,6 +2162,20 @@ func (m *LoadBalanceRequest) GetBalanceReason() TriggerCondition {
 	return TriggerCondition_handoff
 }
 
+func (m *LoadBalanceRequest) GetDstNodeIDs() []int64 {
+	if m != nil {
+		return m.DstNodeIDs
+	}
+	return nil
+}
+
+func (m *LoadBalanceRequest) GetSealedSegmentIDs() []int64 {
+	if m != nil {
+		return m.SealedSegmentIDs
+	}
+	return nil
+}
+
 //---------------- common query proto -----------------
 type SegmentChangeInfo struct {
 	OnlineNodeID         int64          `protobuf:"varint,1,opt,name=online_nodeID,json=onlineNodeID,proto3" json:"online_nodeID,omitempty"`
@@ -2312,151 +2328,153 @@ func init() {
 func init() { proto.RegisterFile("query_coord.proto", fileDescriptor_aab7cc9a69ed26e8) }
 
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+	0xd3, 0xaf, 0x0d, 0x95, 0x53, 0x5c, 0x1b, 0x8a, 0xd7, 0x9a, 0xea, 0xc9, 0xae, 0x35, 0xc6, 0x9f,
+	0xcb, 0xd0, 0x9e, 0x44, 0xc8, 0xcc, 0x5a, 0x9b, 0x65, 0xb0, 0xb7, 0x05, 0xfa, 0xa4, 0xf3, 0xe3,
+	0xb7, 0xe5, 0x43, 0x83, 0x3c, 0xdf, 0xf3, 0x75, 0x46, 0xb9, 0x56, 0xf9, 0x16, 0xb4, 0xa4, 0xce,
+	0xad, 0x74, 0x71, 0x79, 0x4b, 0x45, 0x2c, 0xe3, 0x61, 0x66, 0x33, 0x55, 0x6b, 0x28, 0xfa, 0x10,
+	0xea, 0x3c, 0xee, 0xa3, 0x83, 0x11, 0x96, 0x21, 0xff, 0xba, 0x8a, 0x06, 0xf3, 0xbc, 0x7b, 0x07,
+	0x23, 0x6c, 0xd6, 0x3c, 0xf9, 0x75, 0xda, 0x3a, 0x7f, 0x03, 0x16, 0x43, 0x11, 0xda, 0x8e, 0x95,
+	0x51, 0xdf, 0x02, 0x57, 0xdf, 0xb9, 0x78, 0x71, 0x3b, 0xad, 0xc6, 0x29, 0x5d, 0x7c, 0x6d, 0x6a,
+	0x17, 0xff, 0xcb, 0x12, 0x2c, 0x31, 0xd9, 0x6f, 0xda, 0x9e, 0x1d, 0x0c, 0xf0, 0xec, 0x0d, 0xe9,
+	0x7f, 0xa7, 0x98, 0x16, 0x32, 0x61, 0x45, 0x91, 0x09, 0xb3, 0x45, 0xa1, 0x9a, 0x2f, 0x0a, 0x6f,
+	0x42, 0x43, 0xd2, 0x70, 0x48, 0x80, 0xb9, 0xb2, 0x6b, 0x26, 0x08, 0x50, 0x8f, 0x04, 0xbc, 0x85,
+	0x65, 0xfb, 0xf9, 0xea, 0x02, 0x5f, 0x5d, 0x70, 0x68, 0xc4, 0x97, 0x2e, 0x00, 0x3c, 0xb6, 0x3d,
+	0xd7, 0xe1, 0x4e, 0xc2, 0xd5, 0x54, 0x33, 0xeb, 0x1c, 0xc2, 0x54, 0x60, 0xfc, 0x42, 0x83, 0xa5,
+	0x4f, 0xed, 0xc0, 0x21, 0x7b, 0x7b, 0xa7, 0xcf, 0xaf, 0x1b, 0x10, 0x37, 0xa8, 0xfd, 0xe3, 0x34,
+	0x6d, 0x99, 0x4d, 0xc6, 0x97, 0x25, 0x40, 0x29, 0x7b, 0x9d, 0x5c, 0x9a, 0x4b, 0xd0, 0xce, 0x68,
+	0x3e, 0x79, 0xbf, 0x48, 0xab, 0x9e, 0xb2, 0xba, 0xb7, 0x2b, 0x58, 0x59, 0x21, 0xb6, 0x29, 0x09,
+	0xb8, 0x19, 0x67, 0xae, 0x7b, 0xbb, 0xb1, 0x98, 0x6c, 0x2b, 0xb3, 0xd4, 0xc4, 0x90, 0xf1, 0xd8,
+	0x0b, 0x12, 0x4b, 0x52, 0xd6, 0x54, 0xe4, 0x3b, 0xb6, 0xb8, 0x6e, 0xe8, 0x34, 0xdb, 0xac, 0x51,
+	0xe3, 0x5f, 0x1a, 0x9c, 0x91, 0xbf, 0x2c, 0x7e, 0x87, 0x38, 0x2e, 0x10, 0x24, 0xf0, 0xdc, 0x20,
+	0xf1, 0x28, 0x99, 0x91, 0x04, 0x50, 0xba, 0xcc, 0xa7, 0xd0, 0x91, 0x48, 0x49, 0x86, 0x9d, 0xd1,
+	0x1a, 0x6d, 0xb1, 0x2f, 0xc9, 0xad, 0x97, 0xa0, 0x4d, 0xf6, 0xf6, 0xd2, 0xfc, 0x84, 0x9b, 0xb7,
+	0x24, 0x54, 0x32, 0xfc, 0x0c, 0xf4, 0x18, 0xed, 0xb8, 0x39, 0xbd, 0x23, 0x37, 0x26, 0x5d, 0xe0,
+	0xcf, 0x34, 0xe8, 0x66, 0x33, 0x7c, 0xea, 0xf8, 0xc7, 0x77, 0x84, 0xef, 0x65, 0x87, 0x08, 0x97,
+	0x0e, 0x91, 0x67, 0xc2, 0x47, 0xde, 0xaa, 0x56, 0x9f, 0x41, 0x3b, 0x9b, 0x8a, 0x51, 0x13, 0x6a,
+	0x5b, 0x24, 0xfa, 0xe4, 0xa9, 0x4b, 0x23, 0x7d, 0x0e, 0xb5, 0x01, 0xb6, 0x48, 0xb4, 0x1d, 0x62,
+	0x8a, 0x83, 0x48, 0xd7, 0x10, 0xc0, 0xfc, 0xdd, 0xa0, 0xe7, 0xd2, 0x87, 0x7a, 0x09, 0x9d, 0x95,
+	0x03, 0x4e, 0xdb, 0xeb, 0xcb, 0xbc, 0xa4, 0x97, 0xd9, 0xf6, 0xe4, 0xaf, 0x82, 0x74, 0x68, 0x26,
+	0x28, 0x9b, 0xdb, 0x9f, 0xeb, 0x55, 0x54, 0x87, 0xaa, 0xf8, 0x9c, 0x5f, 0xbd, 0x0b, 0x7a, 0xde,
+	0xe1, 0x50, 0x03, 0x16, 0xf6, 0x45, 0xbc, 0xea, 0x73, 0xa8, 0x03, 0x0d, 0x6f, 0x12, 0x2a, 0xba,
+	0xc6, 0x00, 0xc3, 0x70, 0x34, 0x90, 0x41, 0xa3, 0x97, 0x18, 0x37, 0x66, 0xb5, 0x1e, 0x79, 0x12,
+	0xe8, 0xe5, 0xd5, 0xcf, 0xa0, 0x99, 0x9e, 0xda, 0xa0, 0x1a, 0x54, 0xb6, 0x48, 0x80, 0xf5, 0x39,
+	0x46, 0x76, 0x33, 0x24, 0x4f, 0xdc, 0x60, 0x28, 0xce, 0x70, 0x2b, 0x24, 0xcf, 0x70, 0xa0, 0x97,
+	0xd8, 0x02, 0xf3, 0x4b, 0xb6, 0x50, 0x66, 0x0b, 0xc2, 0x49, 0xf5, 0xca, 0xea, 0xfb, 0x50, 0x8b,
+	0x4b, 0x02, 0x3a, 0x03, 0xad, 0xcc, 0xf3, 0x88, 0x3e, 0x87, 0x90, 0xb8, 0x4e, 0x4e, 0x92, 0xbf,
+	0xae, 0xad, 0xff, 0x03, 0x00, 0xc4, 0xad, 0x84, 0x90, 0xd0, 0x41, 0x23, 0x40, 0x9b, 0x38, 0xda,
+	0x20, 0xfe, 0x88, 0x04, 0xb1, 0x48, 0x14, 0x5d, 0x9f, 0x52, 0xb4, 0x8b, 0xa8, 0xf2, 0x94, 0xcb,
+	0x97, 0xa7, 0xec, 0xc8, 0xa1, 0x1b, 0x73, 0xc8, 0xe7, 0x1c, 0x59, 0xc7, 0x72, 0xcf, 0x1d, 0x3c,
+	0x8c, 0x67, 0xeb, 0x87, 0x70, 0xcc, 0xa1, 0xc6, 0x1c, 0x73, 0x15, 0x5b, 0xfe, 0xec, 0x44, 0xa1,
+	0x1b, 0x0c, 0xe3, 0x81, 0x97, 0x31, 0x87, 0x1e, 0xc1, 0xb9, 0x4d, 0xcc, 0xb9, 0xbb, 0x34, 0x72,
+	0x07, 0x34, 0x66, 0xb8, 0x3e, 0x9d, 0x61, 0x01, 0xf9, 0x98, 0x2c, 0x3d, 0xe8, 0xe4, 0xde, 0x80,
+	0xd1, 0xaa, 0xd2, 0xdf, 0x95, 0xef, 0xd5, 0xcb, 0xef, 0xce, 0x84, 0x9b, 0x70, 0x73, 0xa1, 0x9d,
+	0x7d, 0x1f, 0x45, 0xef, 0x4c, 0x23, 0x50, 0x78, 0x50, 0x5a, 0x5e, 0x9d, 0x05, 0x35, 0x61, 0x75,
+	0x1f, 0xda, 0xd9, 0x17, 0x38, 0x35, 0x2b, 0xe5, 0x2b, 0xdd, 0xf2, 0x61, 0xb3, 0x46, 0x63, 0x0e,
+	0xfd, 0x04, 0xce, 0x14, 0x9e, 0xbd, 0xd0, 0x37, 0x55, 0xe4, 0xa7, 0xbd, 0x8e, 0x1d, 0xc5, 0x41,
+	0x4a, 0x3f, 0xd1, 0xe2, 0x74, 0xe9, 0x0b, 0xef, 0x9f, 0xb3, 0x4b, 0x9f, 0x22, 0x7f, 0x98, 0xf4,
+	0xc7, 0xe6, 0x30, 0x06, 0x54, 0x7c, 0xf8, 0x42, 0xef, 0xa9, 0x58, 0x4c, 0x7d, 0x7c, 0x5b, 0x5e,
+	0x9b, 0x15, 0x3d, 0x31, 0xf9, 0x98, 0x47, 0x6b, 0xfe, 0x89, 0x48, 0xc9, 0x76, 0xea, 0x9b, 0x97,
+	0x9a, 0xed, 0xf4, 0x57, 0x1d, 0xe1, 0xd4, 0xd9, 0x11, 0xb6, 0xda, 0x56, 0xca, 0x97, 0x16, 0xb5,
+	0x53, 0xab, 0x27, 0xe2, 0xc6, 0x1c, 0xb2, 0x00, 0x36, 0x71, 0x74, 0x07, 0x47, 0xa1, 0x3b, 0xa0,
+	0xe8, 0xb2, 0x32, 0xc4, 0x27, 0x08, 0x31, 0x8f, 0x2b, 0x47, 0xe2, 0xc5, 0x0c, 0xd6, 0xbf, 0x02,
+	0xa8, 0x73, 0xed, 0xb2, 0x2a, 0xfd, 0xff, 0x84, 0xfb, 0x02, 0x12, 0xee, 0x03, 0xe8, 0xe4, 0x5e,
+	0x1a, 0xd4, 0x09, 0x57, 0xfd, 0x1c, 0x71, 0x54, 0xe4, 0xed, 0x02, 0x2a, 0x8e, 0xc3, 0xd5, 0x21,
+	0x30, 0x75, 0x6c, 0x7e, 0x14, 0x8f, 0x07, 0xd0, 0xc9, 0x8d, 0xa3, 0xd5, 0x27, 0x50, 0xcf, 0xac,
+	0x67, 0x38, 0x41, 0x71, 0x0c, 0xab, 0x3e, 0xc1, 0xd4, 0x71, 0xed, 0x51, 0x3c, 0xbe, 0x80, 0x66,
+	0x7a, 0x38, 0x87, 0xae, 0x4c, 0xcb, 0xad, 0xb9, 0x16, 0xe7, 0xe5, 0x67, 0xd6, 0x17, 0x5f, 0x79,
+	0x1e, 0x40, 0x27, 0x37, 0x3f, 0x53, 0x5b, 0x57, 0x3d, 0x64, 0x3b, 0x8a, 0xfa, 0xd7, 0x28, 0x57,
+	0xde, 0xfc, 0xe0, 0xfe, 0xfa, 0xd0, 0x8d, 0xf6, 0xc7, 0xbb, 0xec, 0x94, 0xd7, 0x04, 0xe6, 0x7b,
+	0x2e, 0x91, 0x5f, 0xd7, 0xe2, 0xa4, 0x71, 0x8d, 0x53, 0xba, 0xc6, 0xa5, 0x1d, 0xed, 0xee, 0xce,
+	0xf3, 0xdf, 0x1b, 0xff, 0x09, 0x00, 0x00, 0xff, 0xff, 0xa6, 0x2a, 0xbe, 0x5a, 0x78, 0x28, 0x00,
+	0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/internal/querycoord/meta.go b/internal/querycoord/meta.go
index 7539ec2cd8..dca2a827e8 100644
--- a/internal/querycoord/meta.go
+++ b/internal/querycoord/meta.go
@@ -64,6 +64,7 @@ type Meta interface {
 	setSegmentInfos(segmentInfos map[UniqueID]*querypb.SegmentInfo) error
 	showSegmentInfos(collectionID UniqueID, partitionIDs []UniqueID) []*querypb.SegmentInfo
 	getSegmentInfoByID(segmentID UniqueID) (*querypb.SegmentInfo, error)
+	getSegmentInfosByNode(nodeID int64) []*querypb.SegmentInfo
 
 	getPartitionStatesByID(collectionID UniqueID, partitionID UniqueID) (*querypb.PartitionStates, error)
 
@@ -713,6 +714,19 @@ func (m *MetaReplica) getSegmentInfoByID(segmentID UniqueID) (*querypb.SegmentIn
 
 	return nil, errors.New("getSegmentInfoByID: can't find segmentID in segmentInfos")
 }
+func (m *MetaReplica) getSegmentInfosByNode(nodeID int64) []*querypb.SegmentInfo {
+	m.segmentMu.RLock()
+	defer m.segmentMu.RUnlock()
+
+	segmentInfos := make([]*querypb.SegmentInfo, 0)
+	for _, info := range m.segmentInfos {
+		if info.NodeID == nodeID {
+			segmentInfos = append(segmentInfos, proto.Clone(info).(*querypb.SegmentInfo))
+		}
+	}
+
+	return segmentInfos
+}
 
 func (m *MetaReplica) getCollectionInfoByID(collectionID UniqueID) (*querypb.CollectionInfo, error) {
 	m.collectionMu.RLock()
diff --git a/internal/querycoord/meta_test.go b/internal/querycoord/meta_test.go
index b260db4deb..85ad7cba2a 100644
--- a/internal/querycoord/meta_test.go
+++ b/internal/querycoord/meta_test.go
@@ -240,6 +240,11 @@ func TestMetaFunc(t *testing.T) {
 		assert.Equal(t, defaultSegmentID, infos[0].SegmentID)
 	})
 
+	t.Run("Test GetSegmentInfoByNode", func(t *testing.T) {
+		infos := meta.getSegmentInfosByNode(nodeID)
+		assert.Equal(t, 1, len(infos))
+	})
+
 	t.Run("Test getQueryChannel", func(t *testing.T) {
 		info, err := meta.getQueryChannelInfoByID(defaultCollectionID)
 		assert.NotNil(t, info.QueryChannelID)
diff --git a/internal/querycoord/task.go b/internal/querycoord/task.go
index 01354b497a..d88b1e3fc2 100644
--- a/internal/querycoord/task.go
+++ b/internal/querycoord/task.go
@@ -453,7 +453,7 @@ func (lct *loadCollectionTask) execute(ctx context.Context) error {
 
 	}
 
-	err = assignInternalTask(ctx, collectionID, lct, lct.meta, lct.cluster, loadSegmentReqs, watchDmChannelReqs, watchDeltaChannelReqs, false)
+	err = assignInternalTask(ctx, collectionID, lct, lct.meta, lct.cluster, loadSegmentReqs, watchDmChannelReqs, watchDeltaChannelReqs, false, nil)
 	if err != nil {
 		log.Warn("loadCollectionTask: assign child task failed", zap.Int64("collectionID", collectionID))
 		lct.setResultInfo(err)
@@ -778,7 +778,7 @@ func (lpt *loadPartitionTask) execute(ctx context.Context) error {
 
 		}
 	}
-	err := assignInternalTask(ctx, collectionID, lpt, lpt.meta, lpt.cluster, loadSegmentReqs, watchDmReqs, watchDeltaReqs, false)
+	err := assignInternalTask(ctx, collectionID, lpt, lpt.meta, lpt.cluster, loadSegmentReqs, watchDmReqs, watchDeltaReqs, false, nil)
 	if err != nil {
 		log.Warn("loadPartitionTask: assign child task failed", zap.Int64("collectionID", collectionID), zap.Int64s("partitionIDs", partitionIDs))
 		lpt.setResultInfo(err)
@@ -1627,7 +1627,7 @@ func (ht *handoffTask) execute(ctx context.Context) error {
 				ht.setResultInfo(err)
 				return err
 			}
-			err = assignInternalTask(ctx, collectionID, ht, ht.meta, ht.cluster, []*querypb.LoadSegmentsRequest{loadSegmentReq}, nil, watchDeltaChannelReqs, true)
+			err = assignInternalTask(ctx, collectionID, ht, ht.meta, ht.cluster, []*querypb.LoadSegmentsRequest{loadSegmentReq}, nil, watchDeltaChannelReqs, true, nil)
 			if err != nil {
 				log.Error("handoffTask: assign child task failed", zap.Any("segmentInfo", segmentInfo))
 				ht.setResultInfo(err)
@@ -1699,6 +1699,7 @@ func (lbt *loadBalanceTask) timestamp() Timestamp {
 func (lbt *loadBalanceTask) preExecute(context.Context) error {
 	lbt.setResultInfo(nil)
 	log.Debug("start do loadBalanceTask",
+		zap.Int32("trigger type", int32(lbt.triggerCondition)),
 		zap.Int64s("sourceNodeIDs", lbt.SourceNodeIDs),
 		zap.Any("balanceReason", lbt.BalanceReason),
 		zap.Int64("taskID", lbt.getTaskID()))
@@ -1838,7 +1839,7 @@ func (lbt *loadBalanceTask) execute(ctx context.Context) error {
 						}
 					}
 				}
-				err = assignInternalTask(ctx, collectionID, lbt, lbt.meta, lbt.cluster, loadSegmentReqs, watchDmChannelReqs, watchDeltaChannelReqs, true)
+				err = assignInternalTask(ctx, collectionID, lbt, lbt.meta, lbt.cluster, loadSegmentReqs, watchDmChannelReqs, watchDeltaChannelReqs, true, lbt.SourceNodeIDs)
 				if err != nil {
 					log.Warn("loadBalanceTask: assign child task failed", zap.Int64("collectionID", collectionID), zap.Int64s("partitionIDs", partitionIDs))
 					lbt.setResultInfo(err)
@@ -1849,12 +1850,154 @@ func (lbt *loadBalanceTask) execute(ctx context.Context) error {
 		}
 	}
 
-	//TODO::
-	//if lbt.triggerCondition == querypb.TriggerCondition_loadBalance {
-	//	return nil
-	//}
+	//TODO:: use request.DstNodeIDs to balance
+	if lbt.triggerCondition == querypb.TriggerCondition_loadBalance {
+		if len(lbt.SourceNodeIDs) == 0 {
+			err := errors.New("loadBalanceTask: empty source Node list to balance")
+			log.Error(err.Error())
+			lbt.setResultInfo(err)
+			return err
+		}
+
+		balancedSegmentInfos := make(map[UniqueID]*querypb.SegmentInfo)
+		balancedSegmentIDs := make([]UniqueID, 0)
+
+		for _, nodeID := range lbt.SourceNodeIDs {
+			nodeExist := lbt.cluster.hasNode(nodeID)
+			if !nodeExist {
+				err := fmt.Errorf("loadBalanceTask: query node %d is not exist to balance", nodeID)
+				log.Error(err.Error())
+				lbt.setResultInfo(err)
+				return err
+			}
+			segmentInfos := lbt.meta.getSegmentInfosByNode(nodeID)
+			for _, info := range segmentInfos {
+				balancedSegmentInfos[info.SegmentID] = info
+				balancedSegmentIDs = append(balancedSegmentIDs, info.SegmentID)
+			}
+		}
+
+		// check balanced sealedSegmentIDs in request whether exist in query node
+		for _, segmentID := range lbt.SealedSegmentIDs {
+			if _, ok := balancedSegmentInfos[segmentID]; !ok {
+				err := fmt.Errorf("loadBalanceTask: unloaded segment %d", segmentID)
+				log.Warn(err.Error())
+				lbt.setResultInfo(err)
+				return err
+			}
+		}
+
+		if len(lbt.SealedSegmentIDs) != 0 {
+			balancedSegmentIDs = lbt.SealedSegmentIDs
+		}
+
+		col2PartitionIDs := make(map[UniqueID][]UniqueID)
+		par2Segments := make(map[UniqueID][]*querypb.SegmentInfo)
+		for _, segmentID := range balancedSegmentIDs {
+			info := balancedSegmentInfos[segmentID]
+			collectionID := info.CollectionID
+			partitionID := info.PartitionID
+			if _, ok := col2PartitionIDs[collectionID]; !ok {
+				col2PartitionIDs[collectionID] = make([]UniqueID, 0)
+			}
+			if _, ok := par2Segments[partitionID]; !ok {
+				col2PartitionIDs[collectionID] = append(col2PartitionIDs[collectionID], partitionID)
+				par2Segments[partitionID] = make([]*querypb.SegmentInfo, 0)
+			}
+			par2Segments[partitionID] = append(par2Segments[partitionID], info)
+		}
+
+		for collectionID, partitionIDs := range col2PartitionIDs {
+			segmentsToLoad := make([]UniqueID, 0)
+			loadSegmentReqs := make([]*querypb.LoadSegmentsRequest, 0)
+			watchDeltaChannelReqs := make([]*querypb.WatchDeltaChannelsRequest, 0)
+			collectionInfo, err := lbt.meta.getCollectionInfoByID(collectionID)
+			if err != nil {
+				log.Error("loadBalanceTask: can't find collectionID in meta", zap.Int64("collectionID", collectionID), zap.Error(err))
+				lbt.setResultInfo(err)
+				return err
+			}
+			for _, partitionID := range partitionIDs {
+				getRecoveryInfoRequest := &datapb.GetRecoveryInfoRequest{
+					Base:         lbt.Base,
+					CollectionID: collectionID,
+					PartitionID:  partitionID,
+				}
+				recoveryInfo, err := lbt.dataCoord.GetRecoveryInfo(ctx, getRecoveryInfoRequest)
+				if err != nil {
+					lbt.setResultInfo(err)
+					return err
+				}
+
+				segmentID2Binlog := make(map[UniqueID]*datapb.SegmentBinlogs)
+				for _, binlog := range recoveryInfo.Binlogs {
+					segmentID2Binlog[binlog.SegmentID] = binlog
+				}
+
+				for _, segmentInfo := range par2Segments[partitionID] {
+					segmentID := segmentInfo.SegmentID
+					if _, ok := segmentID2Binlog[segmentID]; !ok {
+						log.Warn("loadBalanceTask: can't find binlog of segment to balance, may be has been compacted", zap.Int64("segmentID", segmentID))
+						continue
+					}
+					segmentBingLog := segmentID2Binlog[segmentID]
+					segmentLoadInfo := &querypb.SegmentLoadInfo{
+						SegmentID:    segmentID,
+						PartitionID:  partitionID,
+						CollectionID: collectionID,
+						BinlogPaths:  segmentBingLog.FieldBinlogs,
+						NumOfRows:    segmentBingLog.NumOfRows,
+						Statslogs:    segmentBingLog.Statslogs,
+						Deltalogs:    segmentBingLog.Deltalogs,
+					}
+
+					msgBase := proto.Clone(lbt.Base).(*commonpb.MsgBase)
+					msgBase.MsgType = commonpb.MsgType_LoadSegments
+					loadSegmentReq := &querypb.LoadSegmentsRequest{
+						Base:          msgBase,
+						Infos:         []*querypb.SegmentLoadInfo{segmentLoadInfo},
+						Schema:        collectionInfo.Schema,
+						LoadCondition: querypb.TriggerCondition_grpcRequest,
+					}
+
+					segmentsToLoad = append(segmentsToLoad, segmentID)
+					loadSegmentReqs = append(loadSegmentReqs, loadSegmentReq)
+				}
+
+				// init delta channels for sealed segments.
+				if len(loadSegmentReqs) != 0 && len(watchDeltaChannelReqs) != len(recoveryInfo.Channels) {
+					for _, info := range recoveryInfo.Channels {
+						deltaChannel, err := rootcoord.ConvertChannelName(info.ChannelName, Params.DmlChannelPrefix, Params.DeltaChannelPrefix)
+						if err != nil {
+							return err
+						}
+						deltaInfo := proto.Clone(info).(*datapb.VchannelInfo)
+						deltaInfo.ChannelName = deltaChannel
+						msgBase := proto.Clone(lbt.Base).(*commonpb.MsgBase)
+						msgBase.MsgType = commonpb.MsgType_WatchDeltaChannels
+						watchDeltaRequest := &querypb.WatchDeltaChannelsRequest{
+							Base:         msgBase,
+							CollectionID: collectionID,
+							Infos:        []*datapb.VchannelInfo{deltaInfo},
+						}
+						watchDeltaChannelReqs = append(watchDeltaChannelReqs, watchDeltaRequest)
+					}
+				}
+			}
+
+			// TODO:: assignInternalTask with multi collection
+			err = assignInternalTask(ctx, collectionID, lbt, lbt.meta, lbt.cluster, loadSegmentReqs, nil, watchDeltaChannelReqs, false, lbt.SourceNodeIDs)
+			if err != nil {
+				log.Warn("loadBalanceTask: assign child task failed", zap.Int64("collectionID", collectionID))
+				lbt.setResultInfo(err)
+				return err
+			}
+		}
+		log.Debug("loadBalanceTask: assign child task done", zap.Any("balance request", lbt.LoadBalanceRequest))
+	}
 
 	log.Debug("loadBalanceTask Execute done",
+		zap.Int32("trigger type", int32(lbt.triggerCondition)),
 		zap.Int64s("sourceNodeIDs", lbt.SourceNodeIDs),
 		zap.Any("balanceReason", lbt.BalanceReason),
 		zap.Int64("taskID", lbt.getTaskID()))
@@ -1862,18 +2005,21 @@ func (lbt *loadBalanceTask) execute(ctx context.Context) error {
 }
 
 func (lbt *loadBalanceTask) postExecute(context.Context) error {
-	if lbt.result.ErrorCode == commonpb.ErrorCode_Success {
+	if lbt.result.ErrorCode != commonpb.ErrorCode_Success {
+		lbt.childTasks = []task{}
+	}
+	if lbt.triggerCondition == querypb.TriggerCondition_nodeDown {
 		for _, id := range lbt.SourceNodeIDs {
 			err := lbt.cluster.removeNodeInfo(id)
 			if err != nil {
+				//TODO:: clear node info after removeNodeInfo failed
 				log.Error("loadBalanceTask: occur error when removing node info from cluster", zap.Int64("nodeID", id))
 			}
 		}
-	} else {
-		lbt.childTasks = []task{}
 	}
 
 	log.Debug("loadBalanceTask postExecute done",
+		zap.Int32("trigger type", int32(lbt.triggerCondition)),
 		zap.Int64s("sourceNodeIDs", lbt.SourceNodeIDs),
 		zap.Any("balanceReason", lbt.BalanceReason),
 		zap.Int64("taskID", lbt.getTaskID()))
@@ -2057,7 +2203,7 @@ func assignInternalTask(ctx context.Context,
 	loadSegmentRequests []*querypb.LoadSegmentsRequest,
 	watchDmChannelRequests []*querypb.WatchDmChannelsRequest,
 	watchDeltaChannelRequests []*querypb.WatchDeltaChannelsRequest,
-	wait bool) error {
+	wait bool, excludeNodeIDs []int64) error {
 	sp, _ := trace.StartSpanFromContext(ctx)
 	defer sp.Finish()
 	segmentsToLoad := make([]UniqueID, 0)
@@ -2068,13 +2214,13 @@ func assignInternalTask(ctx context.Context,
 	for _, req := range watchDmChannelRequests {
 		channelsToWatch = append(channelsToWatch, req.Infos[0].ChannelName)
 	}
-	segment2Nodes, err := shuffleSegmentsToQueryNode(segmentsToLoad, cluster, wait, nil)
+	segment2Nodes, err := shuffleSegmentsToQueryNode(segmentsToLoad, cluster, wait, excludeNodeIDs)
 	if err != nil {
 		log.Error("assignInternalTask: segment to node failed", zap.Any("segments map", segment2Nodes), zap.Int64("collectionID", collectionID))
 		return err
 	}
 	log.Debug("assignInternalTask: segment to node", zap.Any("segments map", segment2Nodes), zap.Int64("collectionID", collectionID))
-	watchRequest2Nodes, err := shuffleChannelsToQueryNode(channelsToWatch, cluster, wait, nil)
+	watchRequest2Nodes, err := shuffleChannelsToQueryNode(channelsToWatch, cluster, wait, excludeNodeIDs)
 	if err != nil {
 		log.Error("assignInternalTask: watch request to node failed", zap.Any("request map", watchRequest2Nodes), zap.Int64("collectionID", collectionID))
 		return err
diff --git a/internal/querycoord/task_test.go b/internal/querycoord/task_test.go
index 4cdfd0c8a0..0c90ad42ec 100644
--- a/internal/querycoord/task_test.go
+++ b/internal/querycoord/task_test.go
@@ -694,7 +694,7 @@ func Test_AssignInternalTask(t *testing.T) {
 		loadSegmentRequests = append(loadSegmentRequests, req)
 	}
 
-	err = assignInternalTask(queryCoord.loopCtx, defaultCollectionID, loadCollectionTask, queryCoord.meta, queryCoord.cluster, loadSegmentRequests, nil, nil, false)
+	err = assignInternalTask(queryCoord.loopCtx, defaultCollectionID, loadCollectionTask, queryCoord.meta, queryCoord.cluster, loadSegmentRequests, nil, nil, false, nil)
 	assert.Nil(t, err)
 
 	assert.NotEqual(t, 1, len(loadCollectionTask.getChildTask()))
@@ -789,3 +789,139 @@ func Test_handoffSegmentFail(t *testing.T) {
 	err = removeAllSession()
 	assert.Nil(t, err)
 }
+
+func TestLoadBalanceSegmentsTask(t *testing.T) {
+	refreshParams()
+	ctx := context.Background()
+	queryCoord, err := startQueryCoord(ctx)
+	assert.Nil(t, err)
+
+	node1, err := startQueryNodeServer(ctx)
+	assert.Nil(t, err)
+	waitQueryNodeOnline(queryCoord.cluster, node1.queryNodeID)
+
+	t.Run("Test LoadCollection", func(t *testing.T) {
+		loadCollectionTask := genLoadCollectionTask(ctx, queryCoord)
+
+		err = queryCoord.scheduler.Enqueue(loadCollectionTask)
+		assert.Nil(t, err)
+		waitTaskFinalState(loadCollectionTask, taskExpired)
+	})
+
+	node2, err := startQueryNodeServer(ctx)
+	assert.Nil(t, err)
+	waitQueryNodeOnline(queryCoord.cluster, node2.queryNodeID)
+
+	t.Run("Test LoadBalanceBySegmentID", func(t *testing.T) {
+		baseTask := newBaseTask(ctx, querypb.TriggerCondition_loadBalance)
+		loadBalanceTask := &loadBalanceTask{
+			baseTask: baseTask,
+			LoadBalanceRequest: &querypb.LoadBalanceRequest{
+				Base: &commonpb.MsgBase{
+					MsgType: commonpb.MsgType_LoadBalanceSegments,
+				},
+				SourceNodeIDs:    []int64{node1.queryNodeID},
+				SealedSegmentIDs: []UniqueID{defaultSegmentID},
+			},
+			rootCoord: queryCoord.rootCoordClient,
+			dataCoord: queryCoord.dataCoordClient,
+			cluster:   queryCoord.cluster,
+			meta:      queryCoord.meta,
+		}
+		err = queryCoord.scheduler.Enqueue(loadBalanceTask)
+		assert.Nil(t, err)
+		waitTaskFinalState(loadBalanceTask, taskExpired)
+	})
+
+	t.Run("Test LoadBalanceByNotExistSegmentID", func(t *testing.T) {
+		baseTask := newBaseTask(ctx, querypb.TriggerCondition_loadBalance)
+		loadBalanceTask := &loadBalanceTask{
+			baseTask: baseTask,
+			LoadBalanceRequest: &querypb.LoadBalanceRequest{
+				Base: &commonpb.MsgBase{
+					MsgType: commonpb.MsgType_LoadBalanceSegments,
+				},
+				SourceNodeIDs:    []int64{node1.queryNodeID},
+				SealedSegmentIDs: []UniqueID{defaultSegmentID + 100},
+			},
+			rootCoord: queryCoord.rootCoordClient,
+			dataCoord: queryCoord.dataCoordClient,
+			cluster:   queryCoord.cluster,
+			meta:      queryCoord.meta,
+		}
+		err = queryCoord.scheduler.Enqueue(loadBalanceTask)
+		assert.Nil(t, err)
+		waitTaskFinalState(loadBalanceTask, taskFailed)
+	})
+
+	t.Run("Test LoadBalanceByNode", func(t *testing.T) {
+		baseTask := newBaseTask(ctx, querypb.TriggerCondition_loadBalance)
+		loadBalanceTask := &loadBalanceTask{
+			baseTask: baseTask,
+			LoadBalanceRequest: &querypb.LoadBalanceRequest{
+				Base: &commonpb.MsgBase{
+					MsgType: commonpb.MsgType_LoadBalanceSegments,
+				},
+				SourceNodeIDs: []int64{node1.queryNodeID},
+			},
+			rootCoord: queryCoord.rootCoordClient,
+			dataCoord: queryCoord.dataCoordClient,
+			cluster:   queryCoord.cluster,
+			meta:      queryCoord.meta,
+		}
+		err = queryCoord.scheduler.Enqueue(loadBalanceTask)
+		assert.Nil(t, err)
+		waitTaskFinalState(loadBalanceTask, taskExpired)
+	})
+
+	t.Run("Test LoadBalanceWithEmptySourceNode", func(t *testing.T) {
+		baseTask := newBaseTask(ctx, querypb.TriggerCondition_loadBalance)
+		loadBalanceTask := &loadBalanceTask{
+			baseTask: baseTask,
+			LoadBalanceRequest: &querypb.LoadBalanceRequest{
+				Base: &commonpb.MsgBase{
+					MsgType: commonpb.MsgType_LoadBalanceSegments,
+				},
+			},
+			rootCoord: queryCoord.rootCoordClient,
+			dataCoord: queryCoord.dataCoordClient,
+			cluster:   queryCoord.cluster,
+			meta:      queryCoord.meta,
+		}
+		err = queryCoord.scheduler.Enqueue(loadBalanceTask)
+		assert.Nil(t, err)
+		waitTaskFinalState(loadBalanceTask, taskFailed)
+	})
+
+	t.Run("Test LoadBalanceByNotExistNode", func(t *testing.T) {
+		baseTask := newBaseTask(ctx, querypb.TriggerCondition_loadBalance)
+		loadBalanceTask := &loadBalanceTask{
+			baseTask: baseTask,
+			LoadBalanceRequest: &querypb.LoadBalanceRequest{
+				Base: &commonpb.MsgBase{
+					MsgType: commonpb.MsgType_LoadBalanceSegments,
+				},
+				SourceNodeIDs: []int64{node1.queryNodeID + 100},
+			},
+			rootCoord: queryCoord.rootCoordClient,
+			dataCoord: queryCoord.dataCoordClient,
+			cluster:   queryCoord.cluster,
+			meta:      queryCoord.meta,
+		}
+		err = queryCoord.scheduler.Enqueue(loadBalanceTask)
+		assert.Nil(t, err)
+		waitTaskFinalState(loadBalanceTask, taskFailed)
+	})
+
+	t.Run("Test ReleaseCollection", func(t *testing.T) {
+		releaseCollectionTask := genReleaseCollectionTask(ctx, queryCoord)
+		err = queryCoord.scheduler.processTask(releaseCollectionTask)
+		assert.Nil(t, err)
+	})
+
+	node1.stop()
+	node2.stop()
+	queryCoord.Stop()
+	err = removeAllSession()
+	assert.Nil(t, err)
+}
diff --git a/internal/querynode/impl.go b/internal/querynode/impl.go
index 071a513118..ce4ddb4c75 100644
--- a/internal/querynode/impl.go
+++ b/internal/querynode/impl.go
@@ -515,6 +515,7 @@ func (node *QueryNode) GetSegmentInfo(ctx context.Context, in *queryPb.GetSegmen
 	}
 	infos = append(infos, streamingSegmentInfos...)
 	log.Debug("GetSegmentInfo: get segment info from query node", zap.Int64("nodeID", node.session.ServerID), zap.Any("segment infos", infos))
+
 	return &queryPb.GetSegmentInfoResponse{
 		Status: &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_Success,