diff --git a/app.js b/app.js
index 00b6e79..b5ef590 100644
--- a/app.js
+++ b/app.js
@@ -10,6 +10,16 @@ reptile().then((res)=>{
     reptilelist = res;
 })
 const app = new Koa();
+app.use(async (ctx, next)=> {
+    ctx.set('Access-Control-Allow-Origin', '*');
+    ctx.set('Access-Control-Allow-Headers', 'Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild');
+    ctx.set('Access-Control-Allow-Methods', 'PUT, POST, GET, DELETE, OPTIONS');
+    if (ctx.method == 'OPTIONS') {
+      ctx.body = 200; 
+    } else {
+      await next();
+    }
+  });
 app.use(async (ctx, next) => {
     // 允许来自所有域名请求
     ctx.set("Access-Control-Allow-Origin", "*");