diff --git a/app/api/controller/Index.php b/app/api/controller/Index.php
index 4e1f607810a57ba9d31316d21a33de56d2de1d57..452ef118cb707d59339a6ac537a22147caa18091 100644
--- a/app/api/controller/Index.php
+++ b/app/api/controller/Index.php
@@ -51,7 +51,7 @@ class Index extends BaseController
         ];
         $fileExt = $rule['image'] . ',' . $rule['doc'] . ',' . $rule['file'] . ',' . $rule['video'];
         //1M=1024*1024=1048576字节
-        $fileSize = 100 * 1024 * 1024;
+        $fileSize = $file->getSize();
      if (isset($param['type']) && $param['type']) {
          $fileExt = $rule[$param['type']];
      }