diff --git a/src/core/shortcut.js b/src/core/shortcut.js
index ee05228f3..c579b5884 100644
--- a/src/core/shortcut.js
+++ b/src/core/shortcut.js
@@ -6,6 +6,19 @@
         }
         kv[xtype] = cls;
     };
+
+    BI.mixin = function (xtype, mixins) {
+        var cls;
+        if (BI.isNull(mixins) && BI.isPlainObject(xtype)) {
+            cls = BI.OB;
+            mixins = xtype;
+            BI.extend(cls.prototype, mixins);
+            return;
+        }
+        cls = kv[xtype];
+        BI.extend(cls.prototype, mixins);
+    };
+
     // 根据配置属性生成widget
     var createWidget = function (config) {
         if (config["classType"]) {