diff --git a/framework/base/model.class.php b/framework/base/model.class.php
index 9dec80362c..082b7737c9 100644
--- a/framework/base/model.class.php
+++ b/framework/base/model.class.php
@@ -123,6 +123,15 @@ class baseModel
      */
     public $global;
 
+    /**
+     * $cache对象，用于访问缓存。
+     * The $cache object, used to access the cache.
+     *
+     * @var object
+     * @access public
+     */
+    public $cache;
+
     /**
      * 构造方法。
      * 1. 将全局变量设为model类的成员变量，方便model的派生类调用；