diff --git a/src/permission.js b/src/permission.js
index 8540d8a2..a75cd6f6 100644
--- a/src/permission.js
+++ b/src/permission.js
@@ -16,7 +16,7 @@ whiteList.push(OAUTH2_LOGIN_PAGE_PATH)
 router.beforeEach(async (to, from, next) => {
   console.log(to.query)
   // 单点登录
-  if (to.query.code) {
+  if (to.query.code && !Vue.ls.get(ACCESS_TOKEN)) {
     const { result } = await getSSOUserInfo({ code: to.query.code })
     const userInfo = result.userInfo
     Vue.ls.set(ACCESS_TOKEN, result.token, 7 * 24 * 60 * 60 * 1000)