diff --git a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysUserController.java b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysUserController.java
index e003e65d..7e358d51 100644
--- a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysUserController.java
+++ b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysUserController.java
@@ -136,7 +136,7 @@ public class SysUserController extends BaseController {
     @Log(title = "用户管理", businessType = BusinessType.INSERT)
     @PostMapping
     public R<Void> add(@Validated @RequestBody SysUser user) {
-        if (UserConstants.NOT_UNIQUE.equals(userService.checkUserNameUnique(user.getUserName()))) {
+        if (UserConstants.NOT_UNIQUE.equals(userService.checkUserNameUnique(user))) {
             return R.fail("新增用户'" + user.getUserName() + "'失败，登录账号已存在");
         } else if (StringUtils.isNotEmpty(user.getPhonenumber())
             && UserConstants.NOT_UNIQUE.equals(userService.checkPhoneUnique(user))) {
@@ -158,7 +158,7 @@ public class SysUserController extends BaseController {
     public R<Void> edit(@Validated @RequestBody SysUser user) {
         userService.checkUserAllowed(user);
         userService.checkUserDataScope(user.getUserId());
-        if (UserConstants.NOT_UNIQUE.equals(userService.checkUserNameUnique(user.getUserName()))) {
+        if (UserConstants.NOT_UNIQUE.equals(userService.checkUserNameUnique(user))) {
             return R.fail("修改用户'" + user.getUserName() + "'失败，登录账号已存在");
         } else if (StringUtils.isNotEmpty(user.getPhonenumber())
             && UserConstants.NOT_UNIQUE.equals(userService.checkPhoneUnique(user))) {
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysUserService.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysUserService.java
index 97e73e05..042efc2c 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysUserService.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysUserService.java
@@ -86,7 +86,7 @@ public interface ISysUserService {
      * @param user 用户信息
      * @return 结果
      */
-    String checkUserNameUnique(String userName);
+    String checkUserNameUnique(SysUser user);
 
     /**
      * 校验手机号码是否唯一
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/SysRegisterService.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/SysRegisterService.java
index 6d861e09..983173d1 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/SysRegisterService.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/SysRegisterService.java
@@ -48,15 +48,15 @@ public class SysRegisterService {
         if (captchaEnabled) {
             validateCaptcha(username, registerBody.getCode(), registerBody.getUuid(), request);
         }
-
-        if (UserConstants.NOT_UNIQUE.equals(userService.checkUserNameUnique(username))) {
-            throw new UserException("user.register.save.error", username);
-        }
         SysUser sysUser = new SysUser();
         sysUser.setUserName(username);
         sysUser.setNickName(username);
         sysUser.setPassword(BCrypt.hashpw(password));
         sysUser.setUserType(userType);
+
+        if (UserConstants.NOT_UNIQUE.equals(userService.checkUserNameUnique(sysUser))) {
+            throw new UserException("user.register.save.error", username);
+        }
         boolean regFlag = userService.registerUser(sysUser);
         if (!regFlag) {
             throw new UserException("user.register.error");
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java
index 39ad7273..4e63f17e 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java
@@ -193,12 +193,14 @@ public class SysUserServiceImpl implements ISysUserService {
     /**
      * 校验用户名称是否唯一
      *
-     * @param userName 用户名称
+     * @param user 用户信息
      * @return 结果
      */
     @Override
-    public String checkUserNameUnique(String userName) {
-        boolean exist = baseMapper.exists(new LambdaQueryWrapper<SysUser>().eq(SysUser::getUserName, userName));
+    public String checkUserNameUnique(SysUser user) {
+        boolean exist = baseMapper.exists(new LambdaQueryWrapper<SysUser>()
+            .eq(SysUser::getUserName, user.getUserName())
+            .ne(ObjectUtil.isNotNull(user.getUserId()), SysUser::getUserId, user.getUserId()));
         if (exist) {
             return UserConstants.NOT_UNIQUE;
         }