diff --git a/application/common/library/Upload.php b/application/common/library/Upload.php
index 66afc1dc8d3d12ad5fe249df56eea86dd6913fb1..962e75ba923f3d62e38026fe8e006ce04df6ac25 100644
--- a/application/common/library/Upload.php
+++ b/application/common/library/Upload.php
@@ -36,6 +36,13 @@ class Upload
 
     protected $error = '';
 
+    /**
+     * 保存文件的跟地址
+     *
+     * @var string
+     */
+    protected $saveRootPath =  ROOT_PATH . 'public';
+
     /**
      * @var \think\File
      */
@@ -325,7 +332,7 @@ class Upload
         $uploadDir = substr($savekey, 0, strripos($savekey, '/') + 1);
         $fileName = substr($savekey, strripos($savekey, '/') + 1);
 
-        $destDir = ROOT_PATH . 'public' . str_replace('/', DS, $uploadDir);
+        $destDir = $this->saveRootPath . str_replace('/', DS, $uploadDir);
 
         $sha1 = $this->file->hash();
 
@@ -380,6 +387,17 @@ class Upload
         return $attachment;
     }
 
+    /**
+     * 设置保存文件的根地址
+     *
+     * @param string $path
+     * @return self
+     */
+    public function setSaveRootPath($path) {
+        $this->saveRootPath = $path;
+        return $this;
+    }
+
     public function setError($msg)
     {
         $this->error = $msg;