diff --git a/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/redis/RedisKeyConstants.java b/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/redis/RedisKeyConstants.java
index 24ad2f37..5db4eae5 100644
--- a/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/redis/RedisKeyConstants.java
+++ b/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/redis/RedisKeyConstants.java
@@ -17,6 +17,14 @@ public interface RedisKeyConstants {
      */
     String DEPT_CHILDREN_ID_LIST = "dept_children_ids";
 
+    /**
+     * 指定部门的所有子部门编号数组的缓存
+     * <p>
+     * KEY 格式：dept_child_ids:{id}
+     * VALUE 数据类型：String 子部门编号集合
+     */
+    String DEPT_CHILD_ID_LIST = "dept_child_ids";
+
     /**
      * 角色的缓存
      * <p>
diff --git a/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/service/dept/DeptServiceImpl.java b/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/service/dept/DeptServiceImpl.java
index 7a50dd1f..fc84275c 100644
--- a/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/service/dept/DeptServiceImpl.java
+++ b/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/service/dept/DeptServiceImpl.java
@@ -270,7 +270,7 @@ public class DeptServiceImpl implements DeptService {
 
     @Override
     @DataPermission(enable = false)
-    @Cacheable(cacheNames = RedisKeyConstants.DEPT_CHILDREN_ID_LIST, key = "#id")
+    @Cacheable(cacheNames = RedisKeyConstants.DEPT_CHILD_ID_LIST, key = "#id")
     public List<DeptDO> getChildDept(Long id) {
 
         return deptMapper.selectList(new LambdaQueryWrapperX<DeptDO>()