diff --git a/src/main/java/xuan/service/UserInfoService.java b/src/main/java/xuan/service/UserInfoService.java
index 6dcb1fb..3c7dd5f 100644
--- a/src/main/java/xuan/service/UserInfoService.java
+++ b/src/main/java/xuan/service/UserInfoService.java
@@ -25,11 +25,11 @@ public class UserInfoService {
     public UserInfo loginOrRegister(String openId, String username, String avatarUrl) {
         UserInfo user = userInfoRepository.findByOpenId(openId);
         if (user != null) {
-            user.setUsername(username);
-            user.setAvatarUrl(avatarUrl);
-            return userInfoRepository.save(user);
+            // 用户已存在，不更新用户名和头像，直接返回
+            return user;
         }
         
+        // 新用户才创建
         user = new UserInfo();
         user.setOpenId(openId);
         user.setUsername(username);