diff --git a/src/flexible.js b/src/flexible.js
index 4e7c545..18cf752 100644
--- a/src/flexible.js
+++ b/src/flexible.js
@@ -31,9 +31,10 @@
         }
     }
 
+    var isAndroid = win.navigator.appVersion.match(/android/gi);
+    var isIPhone = win.navigator.appVersion.match(/iphone/gi);
+
     if (!dpr && !scale) {
-        var isAndroid = win.navigator.appVersion.match(/android/gi);
-        var isIPhone = win.navigator.appVersion.match(/iphone/gi);
         var devicePixelRatio = win.devicePixelRatio;
         if (isIPhone) {
             // iOS下，对于2和3的屏，用2倍的方案，其余的用1倍方案
@@ -55,7 +56,9 @@
     if (!metaEl) {
         metaEl = doc.createElement('meta');
         metaEl.setAttribute('name', 'viewport');
-        metaEl.setAttribute('content', 'initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
+        metaEl.setAttribute('content', 
+            isAndroid ? 'width=device-width, ' : '' + 
+            'initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
         if (docEl.firstElementChild) {
             docEl.firstElementChild.appendChild(metaEl);
         } else {
@@ -114,4 +117,4 @@
         return val;
     }
 
-})(window, window['lib'] || (window['lib'] = {}));
\ No newline at end of file
+})(window, window['lib'] || (window['lib'] = {}));