diff --git a/src/main/java/cn/lihongjie/coal/user/service/UserService.java b/src/main/java/cn/lihongjie/coal/user/service/UserService.java
index 96febce7..71696586 100644
--- a/src/main/java/cn/lihongjie/coal/user/service/UserService.java
+++ b/src/main/java/cn/lihongjie/coal/user/service/UserService.java
@@ -81,8 +81,7 @@ public class UserService extends BaseService<UserEntity, UserRepository> {
     @Autowired PasswordDictService passwordDictService;
     private Pbkdf2PasswordEncoder passwordEncoder;
 
-    @Autowired
-    UserService that;
+    @Autowired UserService that;
 
     @PostConstruct
     public void init() {
@@ -193,14 +192,41 @@ public class UserService extends BaseService<UserEntity, UserRepository> {
         UserEntity user = this.repository.get(request.getId());
         this.mapper.updateEntity(user, request);
         this.repository.save(user);
+        String organizationId = user.getOrganizationId();
+
+        assertAdmin(organizationId);
+
         clearUserCache(request.getId());
         return getById(user.getId());
     }
 
+    private void assertAdmin(String organizationId) {
+        long adminCnt =
+                this.repository.count(
+                        new Specification<UserEntity>() {
+                            @Override
+                            public Predicate toPredicate(
+                                    Root<UserEntity> root,
+                                    CriteriaQuery<?> query,
+                                    CriteriaBuilder criteriaBuilder) {
+                                return criteriaBuilder.and(
+                                        criteriaBuilder.equal(
+                                                root.get("organizationId"), organizationId),
+                                        criteriaBuilder.equal(root.get("orgAdmin"), true));
+                            }
+                        });
+
+        if (adminCnt == 0) {
+            throw new BizException("组织必须有一个管理员");
+        }
+    }
+
     public void delete(IdRequest request) {
 
         this.repository.deleteAllById(request.getIds());
         request.getIds().forEach(this::clearUserCache);
+
+        this.assertAdmin(Ctx.currentUser().getOrganizationId());
     }
 
     public UserDto getById(String id) {
@@ -541,7 +567,7 @@ public class UserService extends BaseService<UserEntity, UserRepository> {
         stopWatch.start("contains");
         boolean contains = ids.contains(resourceId);
         stopWatch.stop();
-//        log.info(stopWatch.prettyPrint());
+        //        log.info(stopWatch.prettyPrint());
         return contains;
     }
 
@@ -549,7 +575,5 @@ public class UserService extends BaseService<UserEntity, UserRepository> {
         Try.run(() -> cacheManager.getCache(Constants.CACHE_USER_RESOURCES).clear());
         Try.run(() -> cacheManager.getCache(Constants.CACHE_USER_PERMISSIONS).clear());
         Try.run(() -> cacheManager.getCache(Constants.CACHE_USER_RESOURCE_IDS).clear());
-
-
     }
 }