diff --git a/src/main/java/com/example/demo/serviceImpl/MenuServiceImpl.java b/src/main/java/com/example/demo/serviceImpl/MenuServiceImpl.java
index 5c8b052..eccc44a 100644
--- a/src/main/java/com/example/demo/serviceImpl/MenuServiceImpl.java
+++ b/src/main/java/com/example/demo/serviceImpl/MenuServiceImpl.java
@@ -98,6 +98,7 @@ public class MenuServiceImpl implements MenuService {
 
     @Override
     public Result updatePermission(RoleVo roleVo) {
+        roleVo.setRoleName(roleVo.getRoleName().trim());
         //校验
         if(Objects.isNull(roleVo)) {
             return Result.error("传入角色为空");
@@ -105,6 +106,13 @@ public class MenuServiceImpl implements MenuService {
         if(Objects.isNull(roleVo.getId())) {
             return Result.error("角色ID为空");
         }
+        // 新增校验：角色名长度需在 2 - 20 之间
+        if (roleVo.getRoleName().length() < 2 || roleVo.getRoleName().length() > 20) {
+            return Result.error("角色名长度需在2-20个字符之间");
+        }
+        if (roleMapper.selectByRoleName(roleVo.getRoleName()) != null) {
+            return Result.error("角色名重复");
+        }
         if(roleVo.getMenuIds() == null||roleVo.getMenuIds().isEmpty()) {
             return Result.error("角色权限为空");
         }else