diff --git a/library/think/File.php b/library/think/File.php
index 16f9bfc9..8cd8f292 100644
--- a/library/think/File.php
+++ b/library/think/File.php
@@ -79,7 +79,7 @@ class File extends SplFileObject
             return true;
         }
 
-        if (mkdir($path, 0644, true)) {
+        if (mkdir($path, 0666, true)) {
             return true;
         } else {
             $this->error = "目录 {$path} 创建失败！";