diff --git a/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java b/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java
index a3f3acef..6f0b4518 100644
--- a/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java
+++ b/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java
@@ -37,12 +37,4 @@ public interface SysDeptMapper extends BaseMapperPlus<SysDeptMapper, SysDept, Sy
      */
     List<Long> selectDeptListByRoleId(@Param("roleId") Long roleId, @Param("deptCheckStrictly") boolean deptCheckStrictly);
 
-    /**
-     * 修改子元素关系
-     *
-     * @param depts 子元素
-     * @return 结果
-     */
-    int updateDeptChildren(@Param("depts") List<SysDept> depts);
-
 }
diff --git a/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java b/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java
index f99bd455..ecf2de80 100644
--- a/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java
+++ b/ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java
@@ -21,6 +21,7 @@ import com.ruoyi.system.service.ISysDeptService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -234,11 +235,15 @@ public class SysDeptServiceImpl implements ISysDeptService {
     public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors) {
         List<SysDept> children = baseMapper.selectList(new LambdaQueryWrapper<SysDept>()
             .apply("find_in_set({0},ancestors)", deptId));
+        List<SysDept> list = new ArrayList<>();
         for (SysDept child : children) {
-            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
+            SysDept dept = new SysDept();
+            dept.setDeptId(child.getDeptId());
+            dept.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
+            list.add(dept);
         }
-        if (children.size() > 0) {
-            baseMapper.updateDeptChildren(children);
+        if (list.size() > 0) {
+            baseMapper.updateBatchById(list);
         }
     }
 
diff --git a/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml b/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
index 9f5416f8..f599db02 100644
--- a/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
+++ b/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
@@ -37,17 +37,4 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 		order by d.parent_id, d.order_num
 	</select>
 
-	<update id="updateDeptChildren" parameterType="java.util.List">
-	    update sys_dept set ancestors =
-	    <foreach collection="depts" item="item" index="index"
-	        separator=" " open="case dept_id" close="end">
-	        when #{item.deptId} then #{item.ancestors}
-	    </foreach>
-	    where dept_id in
-	    <foreach collection="depts" item="item" index="index"
-	        separator="," open="(" close=")">
-	        #{item.deptId}
-	    </foreach>
-	</update>
-
 </mapper>