diff --git a/login-wechat/src/main/java/ink/wgink/login/wechat/service/user/impl/MiniAppUserServiceImpl.java b/login-wechat/src/main/java/ink/wgink/login/wechat/service/user/impl/MiniAppUserServiceImpl.java
index 0ce1d0d1..cdda2b73 100644
--- a/login-wechat/src/main/java/ink/wgink/login/wechat/service/user/impl/MiniAppUserServiceImpl.java
+++ b/login-wechat/src/main/java/ink/wgink/login/wechat/service/user/impl/MiniAppUserServiceImpl.java
@@ -10,6 +10,7 @@ import ink.wgink.service.user.pojo.vos.UserVO;
 import ink.wgink.service.user.service.IUserService;
 import ink.wgink.util.date.DateUtil;
 import ink.wgink.util.map.HashMapUtil;
+import ink.wgink.util.string.WStringUtil;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
@@ -43,9 +44,11 @@ public class MiniAppUserServiceImpl extends DefaultBaseService implements IMiniA
             LOG.debug("已经绑定小程序用户");
             return miniAppUserPO.getUserId();
         }
+        // 随机字符串
+        String randomUserName = WStringUtil.randomSubStr(openId, 6);
         UserVO userVO = new UserVO();
-        userVO.setUserUsername(IMiniAppSignService.WECHAT_RANDOM_USER_PREFIX + openId);
-        userVO.setUserName("微信" + openId.substring(0, 6));
+        userVO.setUserUsername(IMiniAppSignService.WECHAT_RANDOM_USER_PREFIX + randomUserName);
+        userVO.setUserName("微信" + randomUserName);
         userVO.setUserPassword(defaultPassword);
         userVO.setUserState(0);
         userVO.setUserType(2);