diff --git a/lib/base/dao/dao.class.php b/lib/base/dao/dao.class.php
index 2e65468c71..8b7f97bb83 100644
--- a/lib/base/dao/dao.class.php
+++ b/lib/base/dao/dao.class.php
@@ -370,6 +370,18 @@ class baseDAO
         if(!empty($this->cache)) $this->cache->set($key, array(microtime(true), $value));
     }
 
+    /**
+     * 清除缓存。
+     * Clear the cache.
+     *
+     * @access public
+     * @return void
+     */
+    public function clearCache()
+    {
+        if(!empty($this->cache)) $this->cache->clear();
+    }
+
     /**
      * 开始事务。
      * Begin Transaction