diff --git a/application/common/controller/Backend.php b/application/common/controller/Backend.php
index c7c514b..56745ff 100755
--- a/application/common/controller/Backend.php
+++ b/application/common/controller/Backend.php
@@ -770,6 +770,13 @@ class Backend extends Controller
     {
         $page = 1;
         $rowIndex = 2;
+        if (ob_get_level()) ob_end_clean();
+        ob_clean();
+
+        ini_set('memory_limit', '512M');
+        set_time_limit(0);
+        ignore_user_abort(true);
+        ini_set('zlib.output_compression', 'Off');
 
         // 创建 Spreadsheet 和 Sheet
         $spreadsheet = new Spreadsheet();