diff --git a/src/main/java/com/cool/modules/base/service/sys/impl/BaseSysDepartmentServiceImpl.java b/src/main/java/com/cool/modules/base/service/sys/impl/BaseSysDepartmentServiceImpl.java
index 2c284cd..6f20ab2 100644
--- a/src/main/java/com/cool/modules/base/service/sys/impl/BaseSysDepartmentServiceImpl.java
+++ b/src/main/java/com/cool/modules/base/service/sys/impl/BaseSysDepartmentServiceImpl.java
@@ -2,6 +2,7 @@ package com.cool.modules.base.service.sys.impl;
 
 import cn.hutool.json.JSONObject;
 import com.cool.core.base.BaseServiceImpl;
+import com.cool.core.exception.CoolPreconditions;
 import com.cool.core.util.CoolSecurityUtil;
 import com.cool.modules.base.entity.sys.BaseSysDepartmentEntity;
 import com.cool.modules.base.entity.sys.BaseSysUserEntity;
@@ -64,21 +65,22 @@ public class BaseSysDepartmentServiceImpl extends
 
     @Override
     public boolean delete(JSONObject requestParams, Long... ids) {
-        super.delete(ids);
-        // 是否删除对应用户 否则移动到顶层部门
-        if (requestParams.getBool("deleteUser")) {
-            return baseSysUserMapper
-                .deleteByQuery(
-                    QueryWrapper.create().in(BaseSysUserEntity::getDepartmentId, (Object) ids)) > 0;
-        } else {
-            BaseSysDepartmentEntity topDepartment = getOne(
-                QueryWrapper.create().isNull(BaseSysDepartmentEntity::getParentId));
-            if (topDepartment != null) {
-                UpdateChain.of(BaseSysUserEntity.class)
-                    .set(BaseSysUserEntity::getDepartmentId, topDepartment.getId())
-                    .in(BaseSysUserEntity::getDepartmentId, (Object) ids).update();
-            }
+        List<Long> allDeptIds = new ArrayList<>(List.of(ids));
+        for (Long id : ids) {
+            collectChildDeptIds(id, allDeptIds);
+        }
+        long userCount = baseSysUserMapper.selectCountByQuery(
+            QueryWrapper.create().in(BaseSysUserEntity::getDepartmentId, allDeptIds));
+        CoolPreconditions.check(userCount > 0, "该部门或其子部门下存在用户，无法删除");
+        return super.delete(ids);
+    }
+
+    private void collectChildDeptIds(Long parentId, List<Long> result) {
+        List<BaseSysDepartmentEntity> children = list(
+            QueryWrapper.create().eq(BaseSysDepartmentEntity::getParentId, parentId));
+        for (BaseSysDepartmentEntity child : children) {
+            result.add(child.getId());
+            collectChildDeptIds(child.getId(), result);
         }
-        return false;
     }
 }
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