diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java
index 0f8ea27..8470f6b 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java
@@ -68,10 +68,18 @@ public class TaskServiceImpl extends ServiceImpl<TaskMapper, Task> implements IT
         try {
             List<Long> res = new ArrayList<>();
             res.add(taskId);
+            Task task = baseMapper.selectOne(Wrappers.<Task>lambdaQuery().eq(Task::getTaskId, taskId));
+            Task fatherTask = baseMapper.selectOne(Wrappers.<Task>lambdaQuery().eq(Task::getTaskId, task.getTaskFatherId()));
+            Integer childrenCount = fatherTask.getChildrenCount() - 1;
+            fatherTask.setChildrenCount(childrenCount);
+            if (baseMapper.update(fatherTask, Wrappers.<Task>lambdaQuery().eq(Task::getTaskId, fatherTask.getTaskId())) != 1) {
+                throw new BadRequestException("删除失败");
+            }
             while (true) {
                 List<Task> list = baseMapper.selectList(
                         Wrappers.<Task>lambdaQuery()
                                 .in(Task::getTaskFatherId, res));
+                baseMapper.update(null, Wrappers.<Task>lambdaUpdate().in(Task::getTaskId, res).set(Task::getChildrenCount, 0));
                 baseMapper.delete(Wrappers.<Task>lambdaQuery().in(Task::getTaskId, res));
                 if (list == null || list.isEmpty()) break;
                 res = list.stream().map(Task::getTaskId).collect(Collectors.toList());