diff --git a/server.js b/server.js
index b5822e9..673647b 100644
--- a/server.js
+++ b/server.js
@@ -47,7 +47,7 @@ function back(){
     /**
      * 数据库备份程序
      * */
-    function backSQL(host, user, passwd, database){
+    function backSQL(user, passwd, database){
         return new Promise(rec => {
             const cout = os.platform() == 'win32' ? '-r' : '>'
                 , filename = `back/BACKUP_${ database }_${ moment().format("YYYY_MM_DD_HH_mm_ss") }.sql`