diff --git a/internal/logic/user/user.go b/internal/logic/user/user.go
index c28e820..29905c0 100644
--- a/internal/logic/user/user.go
+++ b/internal/logic/user/user.go
@@ -141,11 +141,16 @@ func (s *sUser) Login(ctx context.Context, in *model.UserLoginIn) (out *model.Us
 			return nil, ecode.Fail.Sub("参数错误：用户不存在")
 		}
 
-		// User exists, bind in.OpenId and update last login store ID
+		// User exists, check WxOpenId
 		if err := dao.Users.Ctx(ctx).Where(do.Users{XyUserId: xyUserId}).Scan(&user); err != nil {
 			return nil, ecode.Fail.Sub("查找用户失败")
 		}
 		userId = user.Id
+		if user.WxOpenId != "" && user.WxOpenId != in.OpenId {
+			return nil, ecode.Fail.Sub("当前微信已绑定其他微信号")
+		}
+
+		// Bind in.OpenId and update last login store ID
 		if _, err := dao.Users.Ctx(ctx).Where(do.Users{Id: userId}).Update(do.Users{
 			WxOpenId:         in.OpenId,
 			LastLoginAt:      gtime.Now(),