diff --git a/library/think/Model.php b/library/think/Model.php
index 276f4770..0f7d72d3 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -1346,11 +1346,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
 
     public static function __callStatic($method, $params)
     {
-        $model = get_called_class();
-        if (!isset(self::$links[$model])) {
-            self::$links[$model] = (new static())->db();
-        }
-        $query = self::$links[$model];
+        $query = self::getDb();
         // 全局作用域
         if (static::$useGlobalScope && method_exists($model, 'base')) {
             call_user_func_array('static::base', [ & $query]);
@@ -1358,6 +1354,15 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         return call_user_func_array([$query, $method], $params);
     }
 
+    protected static function getDb()
+    {
+        $model = get_called_class();
+        if (!isset(self::$links[$model])) {
+            self::$links[$model] = (new static())->db();
+        }
+        return self::$links[$model];
+    }
+
     /**
      * 修改器 设置数据对象的值
      * @access public