diff --git a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java
index 44c2a21a2d..5897807a0f 100644
--- a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java
+++ b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java
@@ -1077,6 +1077,26 @@ public class ProcessDefinitionServiceImpl extends BaseServiceImpl implements Pro
                 throw new ServiceException(Status.SCHEDULE_STATE_ONLINE, scheduleObj.getId());
             }
         }
+        List<ProcessTaskRelation> processTaskRelations = processTaskRelationMapper
+                .queryByProcessCode(project.getCode(), processDefinition.getCode());
+        if (CollectionUtils.isNotEmpty(processTaskRelations)) {
+            Set<Long> taskCodeList = new HashSet<>(processTaskRelations.size() * 2);
+            for (ProcessTaskRelation processTaskRelation : processTaskRelations) {
+                if (processTaskRelation.getPreTaskCode() != 0) {
+                    taskCodeList.add(processTaskRelation.getPreTaskCode());
+                }
+                if (processTaskRelation.getPostTaskCode() != 0) {
+                    taskCodeList.add(processTaskRelation.getPostTaskCode());
+                }
+            }
+            if (CollectionUtils.isNotEmpty(taskCodeList)) {
+                int i = taskDefinitionMapper.deleteByBatchCodes(new ArrayList<>(taskCodeList));
+                if (i != taskCodeList.size()) {
+                    logger.error("Delete task definition error, processDefinitionCode:{}.", code);
+                    throw new ServiceException(Status.DELETE_TASK_DEFINE_BY_CODE_ERROR);
+                }
+            }
+        }
         int delete = processDefinitionMapper.deleteById(processDefinition.getId());
         if (delete == 0) {
             logger.error("Delete process definition error, processDefinitionCode:{}.", code);
diff --git a/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java
index 8722558d45..8b600696b7 100644
--- a/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java
+++ b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java
@@ -65,6 +65,7 @@ import org.apache.dolphinscheduler.dao.mapper.ProcessDefinitionMapper;
 import org.apache.dolphinscheduler.dao.mapper.ProcessTaskRelationMapper;
 import org.apache.dolphinscheduler.dao.mapper.ProjectMapper;
 import org.apache.dolphinscheduler.dao.mapper.ScheduleMapper;
+import org.apache.dolphinscheduler.dao.mapper.TaskDefinitionMapper;
 import org.apache.dolphinscheduler.dao.mapper.TenantMapper;
 import org.apache.dolphinscheduler.dao.model.PageListingResult;
 import org.apache.dolphinscheduler.dao.repository.ProcessDefinitionDao;
@@ -78,6 +79,7 @@ import java.io.ByteArrayOutputStream;
 import java.nio.charset.StandardCharsets;
 import java.text.MessageFormat;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.Date;
 import java.util.HashMap;
@@ -127,6 +129,9 @@ public class ProcessDefinitionServiceTest extends BaseServiceTestTool {
     @Mock
     private ProcessDefinitionMapper processDefinitionMapper;
 
+    @Mock
+    private TaskDefinitionMapper taskDefinitionMapper;
+
     @Mock
     private ProcessDefinitionLogMapper processDefinitionLogMapper;
 
@@ -499,6 +504,9 @@ public class ProcessDefinitionServiceTest extends BaseServiceTestTool {
 
         // delete success
         schedule.setReleaseState(ReleaseState.OFFLINE);
+        Mockito.when(processTaskRelationMapper.queryByProcessCode(1, 11))
+                .thenReturn(getProcessTaskRelation());
+        Mockito.when(taskDefinitionMapper.deleteByBatchCodes(Arrays.asList(100L, 200L))).thenReturn(2);
         Mockito.when(processDefinitionMapper.deleteById(46)).thenReturn(1);
         Mockito.when(scheduleMapper.deleteById(schedule.getId())).thenReturn(1);
         Mockito.when(processTaskRelationMapper.deleteByCode(project.getCode(), processDefinition.getCode()))
@@ -507,6 +515,13 @@ public class ProcessDefinitionServiceTest extends BaseServiceTestTool {
         Mockito.when(workFlowLineageService.queryTaskDepOnProcess(project.getCode(), processDefinition.getCode()))
                 .thenReturn(Collections.emptySet());
         Assertions.assertDoesNotThrow(() -> processDefinitionService.deleteProcessDefinitionByCode(user, 46L));
+
+        // delete fail
+        Mockito.when(taskDefinitionMapper.deleteByBatchCodes(Arrays.asList(100L, 200L))).thenReturn(1);
+        exception = Assertions.assertThrows(ServiceException.class,
+                () -> processDefinitionService.deleteProcessDefinitionByCode(user, 46L));
+        Assertions.assertEquals(Status.DELETE_TASK_DEFINE_BY_CODE_ERROR.getCode(),
+                ((ServiceException) exception).getCode());
     }
 
     @Test
@@ -1121,6 +1136,8 @@ public class ProcessDefinitionServiceTest extends BaseServiceTestTool {
         processTaskRelation.setProjectCode(projectCode);
         processTaskRelation.setProcessDefinitionCode(46L);
         processTaskRelation.setProcessDefinitionVersion(1);
+        processTaskRelation.setPreTaskCode(100);
+        processTaskRelation.setPostTaskCode(200);
         processTaskRelations.add(processTaskRelation);
         return processTaskRelations;
     }
diff --git a/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.java b/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.java
index 629cd9bf7b..17243de049 100644
--- a/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.java
+++ b/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.java
@@ -141,4 +141,12 @@ public interface TaskDefinitionMapper extends BaseMapper<TaskDefinition> {
      */
     IPage<TaskDefinition> filterTaskDefinition(IPage<TaskDefinition> page,
                                                @Param("task") TaskDefinition taskDefinition);
+
+    /**
+     * batch delete task by task code
+     *
+     * @param taskCodeList task code list
+     * @return deleted row count
+     */
+    int deleteByBatchCodes(@Param("taskCodeList") List<Long> taskCodeList);
 }
diff --git a/dolphinscheduler-dao/src/main/resources/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.xml b/dolphinscheduler-dao/src/main/resources/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.xml
index 2c6a5cbe8a..46c6dfcbcf 100644
--- a/dolphinscheduler-dao/src/main/resources/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.xml
+++ b/dolphinscheduler-dao/src/main/resources/org/apache/dolphinscheduler/dao/mapper/TaskDefinitionMapper.xml
@@ -86,6 +86,14 @@
         delete from t_ds_task_definition
         where code = #{code}
     </delete>
+
+    <delete id="deleteByBatchCodes">
+        delete from t_ds_task_definition where code in
+        <foreach collection="taskCodeList" item="taskCode" open="(" separator="," close=")">
+            #{taskCode}
+        </foreach>
+    </delete>
+
     <insert id="batchInsert">
         insert into t_ds_task_definition (code, name, version, description, project_code, user_id,
         task_type, task_params, flag, task_priority, worker_group, environment_code, fail_retry_times, fail_retry_interval,