diff --git a/src/includes.ts b/src/includes.ts
index 5f6e3d4..c05847c 100644
--- a/src/includes.ts
+++ b/src/includes.ts
@@ -80,8 +80,8 @@ export async function acquireCourse(course: IJsonCourse, channel: TChannel): Pro
             return true
         } else {
             logAndNotifyUser(resp.data.message)
-            if(resp.data.message.includes('当前账号已在别处登录')){
-                await resetCookie()
+            if (resp.data.message.includes('当前账号已在别处登录')) {
+                await resetCookie()// TODO 加锁、优化
             }
             return false
         }
@@ -97,7 +97,7 @@ export async function exitCourse(course: IJsonCourse): Promise<boolean> {
             return true
         } else {
             logAndNotifyUser('[exitCourse]退课失败：' + resp.data.message)
-            if(resp.data.message.includes('当前账号已在别处登录')){
+            if (resp.data.message.includes('当前账号已在别处登录')) {
                 await resetCookie()
             }
             return false
@@ -108,42 +108,55 @@ export async function exitCourse(course: IJsonCourse): Promise<boolean> {
     }
 }
 
+let resetCookieLock = false
+
 export async function resetCookie() {
-    let cookieJar = new tough.CookieJar()
-    let cookieAxios = axios.create({
-        headers: {
-            'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
-            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0'
-        },
-        timeout: 6000,
-        maxRedirects: 10
-    })
-    axiosCookieJarSupport(cookieAxios)
-    cookieAxios.defaults.jar = cookieJar
-    cookieAxios.defaults.withCredentials = true
-    await cookieAxios.get('http://bkzhjx.wh.sdu.edu.cn/sso.jsp')
-    let casUrl = 'https://pass.sdu.edu.cn/cas/login?service=http%3A%2F%2Fbkzhjx.wh.sdu.edu.cn%2Fsso.jsp'
-    let resp = await cookieAxios.get(casUrl)
-    let ticket = /name="lt" value="(.*?)"/.exec(resp.data)?.[1] || null
-    let rsa = strEnc(appConfig.username + appConfig.password + ticket, '1', '2', '3')
-    resp = await cookieAxios.post(casUrl, qs.stringify({
-        rsa,
-        ul: appConfig.username.length,
-        pl: appConfig.password.length,
-        lt: ticket,
-        execution: 'e1s1',
-        _eventId: 'submit'
-    }))
-    let nextUrl = 'https://bkzhjx.wh.sdu.edu.cn' + /<a href="(.*?)">进入选课/.exec(resp.data)![1]
-    resp = await cookieAxios.get(nextUrl)
-    let xkId = /jrxk\('1','(.*?)'/.exec(resp.data)![1]
-    nextUrl = 'https://bkzhjx.wh.sdu.edu.cn/jsxsd/xsxk/newXsxkzx?jx0502zbid=' + xkId
-    await cookieAxios.get(nextUrl)
-    await cookieAxios.get('https://bkzhjx.wh.sdu.edu.cn/jsxsd/xsxk/selectBottom?jx0502zbid=' + xkId)
-    let cookieString = cookieJar.getCookieStringSync('https://bkzhjx.wh.sdu.edu.cn/jsxsd/xsxk')
-    console.log('[cookie]取得Cookie：' + cookieString)
-    appConfig.cookie = cookieString
-    sduAxios.defaults.headers['Cookie'] = cookieString
+    if (resetCookieLock) {
+        console.log('resetCookie 已被锁定')
+        return
+    }
+    resetCookieLock = true
+    try {
+        let cookieJar = new tough.CookieJar()
+        let cookieAxios = axios.create({
+            headers: {
+                'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
+                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0'
+            },
+            timeout: 6000,
+            maxRedirects: 10
+        })
+        axiosCookieJarSupport(cookieAxios)
+        cookieAxios.defaults.jar = cookieJar
+        cookieAxios.defaults.withCredentials = true
+        await cookieAxios.get('http://bkzhjx.wh.sdu.edu.cn/sso.jsp')
+        let casUrl = 'https://pass.sdu.edu.cn/cas/login?service=http%3A%2F%2Fbkzhjx.wh.sdu.edu.cn%2Fsso.jsp'
+        let resp = await cookieAxios.get(casUrl)
+        let ticket = /name="lt" value="(.*?)"/.exec(resp.data)?.[1] || null
+        let rsa = strEnc(appConfig.username + appConfig.password + ticket, '1', '2', '3')
+        resp = await cookieAxios.post(casUrl, qs.stringify({
+            rsa,
+            ul: appConfig.username.length,
+            pl: appConfig.password.length,
+            lt: ticket,
+            execution: 'e1s1',
+            _eventId: 'submit'
+        }))
+        let nextUrl = 'https://bkzhjx.wh.sdu.edu.cn' + /<a href="(.*?)">进入选课/.exec(resp.data)![1]
+        resp = await cookieAxios.get(nextUrl)
+        let xkId = /jrxk\('1','(.*?)'/.exec(resp.data)![1]
+        nextUrl = 'https://bkzhjx.wh.sdu.edu.cn/jsxsd/xsxk/newXsxkzx?jx0502zbid=' + xkId
+        await cookieAxios.get(nextUrl)
+        await cookieAxios.get('https://bkzhjx.wh.sdu.edu.cn/jsxsd/xsxk/selectBottom?jx0502zbid=' + xkId)
+        let cookieString = cookieJar.getCookieStringSync('https://bkzhjx.wh.sdu.edu.cn/jsxsd/xsxk')
+        console.log('[cookie]取得Cookie：' + cookieString)
+        appConfig.cookie = cookieString
+        sduAxios.defaults.headers['Cookie'] = cookieString
+    } catch (e) {
+        throw e
+    } finally {
+        resetCookieLock = false
+    }
 }
 
 export function countStr(str: string, word: string) {