diff --git a/src/02-core.js b/src/02-core.js
index fd567a4..6a12281 100644
--- a/src/02-core.js
+++ b/src/02-core.js
@@ -466,7 +466,6 @@ Anot.mix({
   },
   //获取url的参数
   search: function(key) {
-    key += ''
     let uri = location.search
 
     if (!uri) {