diff --git a/internal/datanode/compaction/clustering_compactor.go b/internal/datanode/compaction/clustering_compactor.go
index 7b19bf9370..248e08be9a 100644
--- a/internal/datanode/compaction/clustering_compactor.go
+++ b/internal/datanode/compaction/clustering_compactor.go
@@ -197,6 +197,11 @@ func (t *clusteringCompactionTask) init() error {
 		return merr.WrapErrIllegalCompactionPlan("empty schema in compactionPlan")
 	}
 	for _, field := range t.plan.Schema.Fields {
+		// todo(wayblink): supprot null in clustring compact
+		if field.GetNullable() {
+			return merr.WrapErrParameterInvalidMsg(fmt.Sprintf("clustering compaction can't be trigger in field(%s) which set nullable == true", field.GetName()))
+		}
+
 		if field.GetIsPrimaryKey() && field.GetFieldID() >= 100 && typeutil.IsPrimaryFieldType(field.GetDataType()) {
 			pkField = field
 		}
diff --git a/internal/datanode/compaction/clustering_compactor_test.go b/internal/datanode/compaction/clustering_compactor_test.go
index 31973712c2..8ed753410e 100644
--- a/internal/datanode/compaction/clustering_compactor_test.go
+++ b/internal/datanode/compaction/clustering_compactor_test.go
@@ -167,6 +167,22 @@ func (s *ClusteringCompactionTaskSuite) TestCompactionInit() {
 	s.Equal(8, s.task.getWorkerPoolSize())
 	s.Equal(8, s.task.mappingPool.Cap())
 	s.Equal(8, s.task.flushPool.Cap())
+
+	s.task.plan.Schema = genCollectionSchema()
+	s.task.plan.Schema.Fields = append(s.task.plan.Schema.Fields, &schemapb.FieldSchema{
+		FieldID:  104,
+		Name:     "nullableFid",
+		DataType: schemapb.DataType_Int64,
+		Nullable: true,
+	})
+	s.task.plan.ClusteringKeyField = 100
+	s.task.plan.SegmentBinlogs = []*datapb.CompactionSegmentBinlogs{
+		{
+			SegmentID: 100,
+		},
+	}
+	err = s.task.init()
+	s.Require().Error(err)
 }
 
 func (s *ClusteringCompactionTaskSuite) TestScalarCompactionNormal() {