diff --git a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Table.java b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Table.java
index b1c75012..a9754a0a 100644
--- a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Table.java
+++ b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Table.java
@@ -364,11 +364,11 @@ public class Table {
     /**
      * 构建 extends 继承。
      */
-    public String buildExtends() {
+    public String buildExtends(boolean isBase) {
         EntityConfig entityConfig = globalConfig.getEntityConfig();
         Class<?> superClass = entityConfig.getSuperClass(this);
         if (superClass != null) {
-            return " extends " + superClass.getSimpleName()+(entityConfig.isSuperClassGenericity()?("<"+buildEntityClassName()+">"):"");
+            return " extends " + superClass.getSimpleName()+(entityConfig.isSuperClassGenericity()?("<"+buildEntityClassName()+(isBase?entityConfig.getWithBaseClassSuffix():"")+">"):"");
         } else {
             return "";
         }
@@ -389,14 +389,14 @@ public class Table {
     /**
      * 构建 kt 继承
      */
-    public String buildKtExtends(){
+    public String buildKtExtends(boolean isBase){
         EntityConfig entityConfig = globalConfig.getEntityConfig();
         Class<?> superClass = entityConfig.getSuperClass(this);
         List<String> s = new ArrayList<>();
         if (superClass != null) {
             String name = superClass.getSimpleName();
             if (entityConfig.isSuperClassGenericity()){
-                name+="<"+buildEntityClassName()+">";
+                name+="<"+buildEntityClassName()+(isBase?entityConfig.getWithBaseClassSuffix():"")+">";
             }
             name+="()";
             s.add(name);
diff --git a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/generator/impl/EntityGenerator.java b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/generator/impl/EntityGenerator.java
index 544a3fb8..48f9951a 100644
--- a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/generator/impl/EntityGenerator.java
+++ b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/generator/impl/EntityGenerator.java
@@ -38,6 +38,7 @@ public class EntityGenerator implements IGenerator {
     protected String templatePath;
 
     protected String entityWithBaseTemplatePath = "/templates/enjoy/entityWithBase.tpl";
+    protected String ktEntityWithBaseTemplatePath = "/templates/enjoy/entityWithBase.kotlin.tpl";
 
 
     public EntityGenerator() {
@@ -98,11 +99,12 @@ public class EntityGenerator implements IGenerator {
         // 开启生成 baseClass
         if (entityConfig.isWithBaseClassEnable()) {
             if (globalConfig.getFileType() == GlobalConfig.FileType.KOTLIN) {
-                throw new UnsupportedOperationException("暂不支持 Kotlin 生成 WithBaseClass 模式。");
+//                throw new UnsupportedOperationException("暂不支持 Kotlin 生成 WithBaseClass 模式。");
+                templatePath = this.ktEntityWithBaseTemplatePath;
+            }else{
+                templatePath = this.entityWithBaseTemplatePath;
             }
 
-            templatePath = this.entityWithBaseTemplatePath;
-
             String baseClassName = table.buildEntityClassName() + entityConfig.getWithBaseClassSuffix();
             params.put("baseClassName", baseClassName);
 
@@ -136,7 +138,7 @@ public class EntityGenerator implements IGenerator {
 
         String baseEntityClassName = table.buildEntityClassName() + entityConfig.getWithBaseClassSuffix();
 
-        File baseEntityJavaFile = new File(sourceDir, baseEntityPackagePath + "/" + baseEntityClassName + ".java");
+        File baseEntityJavaFile = new File(sourceDir, baseEntityPackagePath + "/" + baseEntityClassName + globalConfig.getFileType());
 
 
         // 排除忽略列
diff --git a/mybatis-flex-codegen/src/main/resources/templates/enjoy/entity.kotlin.tpl b/mybatis-flex-codegen/src/main/resources/templates/enjoy/entity.kotlin.tpl
index 2d8d453b..ea2317ff 100644
--- a/mybatis-flex-codegen/src/main/resources/templates/enjoy/entity.kotlin.tpl
+++ b/mybatis-flex-codegen/src/main/resources/templates/enjoy/entity.kotlin.tpl
@@ -1,7 +1,7 @@
 #set(withSwagger = entityConfig.isWithSwagger())
 #set(withActiveRecord = entityConfig.isWithActiveRecord())
 
-package #(entityPackageName);
+package #(entityPackageName)
 
 #for(importClass : table.buildImports(isBase))
 import #(importClass)
@@ -18,6 +18,7 @@ import io.swagger.annotations.ApiModelProperty
 #if(withSwagger && swaggerVersion.getName() == "DOC")
 import io.swagger.v3.oas.annotations.media.Schema
 #end
+#if(!isBase)
 /**
  * #(table.getComment()) 实体类。
  *
@@ -25,7 +26,8 @@ import io.swagger.v3.oas.annotations.media.Schema
  * @since #(javadocConfig.getSince())
  */
 #(table.buildTableAnnotation())
-class #(entityClassName) #if(withActiveRecord) : Model<#(entityClassName)>()#else#(table.buildKtExtends())#end  {
+#end
+#if(isBase)open #end class #(entityClassName) #if(withActiveRecord) : Model<#(entityClassName)>()#else#(table.buildKtExtends(isBase))#end  {
 #for(column : table.columns)
     #set(comment = javadocConfig.formatColumnComment(column.comment))
     #if(isNotBlank(comment))
@@ -43,7 +45,7 @@ class #(entityClassName) #if(withActiveRecord) : Model<#(entityClassName)>()#els
     #if(withSwagger && swaggerVersion.getName() == "DOC")
     @Schema(description = "#(column.comment)")
     #end
-    var #(column.property): #(column.propertySimpleType)? = #if(isNotBlank(column.propertyDefaultValue)) = #(column.propertyDefaultValue)#else null#end
+    #if(isBase)open #end var #(column.property): #(column.propertySimpleType)? = #if(isNotBlank(column.propertyDefaultValue)) = #(column.propertyDefaultValue)#else null#end
 
 #end
 }
diff --git a/mybatis-flex-codegen/src/main/resources/templates/enjoy/entityOrBase.tpl b/mybatis-flex-codegen/src/main/resources/templates/enjoy/entityOrBase.tpl
index 86e0a348..70d7e95f 100644
--- a/mybatis-flex-codegen/src/main/resources/templates/enjoy/entityOrBase.tpl
+++ b/mybatis-flex-codegen/src/main/resources/templates/enjoy/entityOrBase.tpl
@@ -12,6 +12,10 @@ import #(importClass);
 import com.mybatisflex.core.activerecord.Model;
 #end
 
+#if(jdkVersion >= 14)
+import java.io.Serial;
+#end
+
 #if(!isBase)
 #if(withSwagger && swaggerVersion.getName() == "FOX")
 import io.swagger.annotations.ApiModel;
@@ -35,9 +39,6 @@ import lombok.EqualsAndHashCode;
 #end
 #end
 #end
-#if(jdkVersion >= 14)
-import java.io.Serial;
-#end
 
 /**
  * #(table.getComment()) 实体类。
@@ -67,7 +68,7 @@ import java.io.Serial;
 @Schema(description = "#(table.getComment())")
 #end
 #(table.buildTableAnnotation()) #end
-public class #(entityClassName)#if(withActiveRecord) extends Model<#(entityClassName)>#else#(table.buildExtends())#(table.buildImplements())#end  {
+public class #(entityClassName)#if(withActiveRecord) extends Model<#(entityClassName)>#else#(table.buildExtends(isBase))#(table.buildImplements())#end  {
 
     #if(jdkVersion >= 14)
     @Serial
diff --git a/mybatis-flex-codegen/src/main/resources/templates/enjoy/entityWithBase.kotlin.tpl b/mybatis-flex-codegen/src/main/resources/templates/enjoy/entityWithBase.kotlin.tpl
new file mode 100644
index 00000000..da39d76e
--- /dev/null
+++ b/mybatis-flex-codegen/src/main/resources/templates/enjoy/entityWithBase.kotlin.tpl
@@ -0,0 +1,35 @@
+#set(withSwagger = entityConfig.isWithSwagger())
+#set(withActiveRecord = entityConfig.isWithActiveRecord())
+
+package #(entityPackageName)
+
+#for(importClass : table.buildImports(isBase))
+import #(importClass)
+#end
+import #(baseClassPackage).#(baseClassName);
+
+#if(withActiveRecord)
+import com.mybatisflex.core.activerecord.Model
+#end
+
+#if(withSwagger && swaggerVersion.getName() == "FOX")
+import io.swagger.annotations.ApiModel
+import io.swagger.annotations.ApiModelProperty
+#end
+#if(withSwagger && swaggerVersion.getName() == "DOC")
+import io.swagger.v3.oas.annotations.media.Schema
+#end
+/**
+ * #(table.getComment()) 实体类。
+ *
+ * @author #(javadocConfig.getAuthor())
+ * @since #(javadocConfig.getSince())
+ */
+#if(withSwagger && swaggerVersion.getName() == "FOX")
+@ApiModel("#(table.getComment())")
+#end
+#if(withSwagger && swaggerVersion.getName() == "DOC")
+@Schema(description = "#(table.getComment())")
+#end
+#if(!isBase)#(table.buildTableAnnotation())#end
+class #(entityClassName) : #(baseClassName)()