diff --git a/application/admin/controller/Order.php b/application/admin/controller/Order.php
index b2f51a8..e4f9b3e 100644
--- a/application/admin/controller/Order.php
+++ b/application/admin/controller/Order.php
@@ -1191,44 +1191,5 @@ class Order extends Backend
     }
 
 
-    protected function streamCsv(array $columns, \Generator $rows, string $filename)
-    {
-        set_time_limit(0);
-        ini_set('memory_limit', '-1');
-        ignore_user_abort(true);
-
-        header('Content-Type: text/csv; charset=UTF-8');
-        header('Content-Disposition: attachment;filename="' . $filename . '"');
-        header('Cache-Control: max-age=0');
-        header('Pragma: public');
-
-        // 防止 Excel 打开乱码
-        echo "\xEF\xBB\xBF";
-
-        $output = fopen('php://output', 'w');
-
-        $fields = array_column($columns, 'field');
-        $titles = array_column($columns, 'title');
-
-        // 写入表头
-        fputcsv($output, $titles);
-
-        // 逐行写入数据
-        foreach ($rows as $row) {
-            $line = [];
-            foreach ($fields as $field) {
-                $value = $this->getNestedValue($row, $field);
-                if (is_array($value) || is_object($value)) {
-                    $value = json_encode($value, JSON_UNESCAPED_UNICODE);
-                }
-                $line[] = $value;
-            }
-            fputcsv($output, $line);
-        }
-
-        fclose($output);
-        exit;
-    }
-
 
 }
diff --git a/application/common/controller/Backend.php b/application/common/controller/Backend.php
index 1357357..da56d80 100755
--- a/application/common/controller/Backend.php
+++ b/application/common/controller/Backend.php
@@ -766,75 +766,42 @@ class Backend extends Controller
         return $res;
     }
 
-    protected function exportCsvByStream(array $columns, callable $fetchData, string $filename = '导出.csv', int $limit = 1000)
+    protected function streamCsv(array $columns, \Generator $rows, string $filename)
     {
-        $page = 1;
-        $rowIndex = 2;
-
-        ini_set('memory_limit', '512M');
         set_time_limit(0);
+        ini_set('memory_limit', '-1');
         ignore_user_abort(true);
-        ini_set('zlib.output_compression', 'Off');
-
-        // 创建 Spreadsheet 和 Sheet
-        $spreadsheet = new Spreadsheet();
-        $spreadsheet->removeSheetByIndex(0);
-        $sheet = new Worksheet($spreadsheet, 'Sheet1');
-        $spreadsheet->addSheet($sheet);
-        $spreadsheet->setActiveSheetIndex(0);
-        $sheet = $spreadsheet->getActiveSheet();
-
-        $writer = new Csv($spreadsheet);
-        $writer->setDelimiter(','); // 可改为 \t 导出为 TSV
-        $writer->setEnclosure('"');
-        $writer->setLineEnding("\r\n");
-        $writer->setSheetIndex(0);
-
-        // 获取字段映射
-        $titles = array_column($columns, 'title');
-        $fields = array_column($columns, 'field');
-
-        // 写入表头
-        $sheet->fromArray($titles, null, 'A1');
-
-        // 分页写入数据
-        do {
-            $rows = $fetchData($page, $limit);
-            $count = count($rows);
-            if ($count === 0) break;
-
-            foreach ($rows as $row) {
-                $dataRow = [];
-                foreach ($fields as $field) {
-                    $value = $this->getNestedValue($row->toArray(), $field);
-                    if (is_array($value) || is_object($value)) {
-                        $value = json_encode($value, JSON_UNESCAPED_UNICODE);
-                    }
-                    $dataRow[] = $value;
-                }
-                $sheet->fromArray($dataRow, null, 'A' . $rowIndex);
-                $rowIndex++;
-            }
-
-            $page++;
-        } while ($count === $limit);
-
-        // 输出为 CSV 下载流
-        $filename = $filename ?: ('导出_' . date('Ymd_His') . '.csv');
 
         header('Content-Type: text/csv; charset=UTF-8');
         header('Content-Disposition: attachment;filename="' . $filename . '"');
         header('Cache-Control: max-age=0');
-        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
-        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
         header('Pragma: public');
 
-        // 输出 UTF-8 BOM 防止 Excel 乱码
+        // 防止 Excel 打开乱码
         echo "\xEF\xBB\xBF";
 
-        $writer->save('php://output');
-        $spreadsheet->disconnectWorksheets();
-        unset($spreadsheet);
+        $output = fopen('php://output', 'w');
+
+        $fields = array_column($columns, 'field');
+        $titles = array_column($columns, 'title');
+
+        // 写入表头
+        fputcsv($output, $titles);
+
+        // 逐行写入数据
+        foreach ($rows as $row) {
+            $line = [];
+            foreach ($fields as $field) {
+                $value = $this->getNestedValue($row, $field);
+                if (is_array($value) || is_object($value)) {
+                    $value = json_encode($value, JSON_UNESCAPED_UNICODE);
+                }
+                $line[] = $value;
+            }
+            fputcsv($output, $line);
+        }
+
+        fclose($output);
         exit;
     }
     protected function getNestedValue(array $data, string $path, $default = '')