diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index ccb3e4bfb..77c737359 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -172,6 +172,7 @@ class WechatsController < ActionController::Base
        raise "非法操作, code不存在" unless params[:code]
        openid = get_openid(params[:code])
        raise "无法获取到openid" unless openid
+       raise "此微信号已绑定用户, 不能得复绑定" if UserWechat.where(openid: openid).first
 
        user, last_login_on = User.try_to_login(params[:username], params[:password])
        raise "用户名或密码错误,请重新登录" unless user