diff --git a/kh-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserServiceImpl.java b/kh-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserServiceImpl.java
index 06c2a889..69a2d6aa 100644
--- a/kh-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserServiceImpl.java
+++ b/kh-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserServiceImpl.java
@@ -640,8 +640,8 @@ public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> impl
 		this.updateById(user);
 		//step.2 修改角色
 		//处理用户角色 先删后加
-		sysUserRoleMapper.delete(new QueryWrapper<SysUserRole>().lambda().eq(SysUserRole::getUserId, user.getId()));
 		if(oConvertUtils.isNotEmpty(roles)) {
+			sysUserRoleMapper.delete(new QueryWrapper<SysUserRole>().lambda().eq(SysUserRole::getUserId, user.getId()));
 			String[] arr = roles.split(",");
 			for (String roleId : arr) {
 				SysUserRole userRole = new SysUserRole(user.getId(), roleId);