diff --git a/lib/upload_image/look_images_widget.dart b/lib/upload_image/look_images_widget.dart
index f8443e4..47c1f2c 100644
--- a/lib/upload_image/look_images_widget.dart
+++ b/lib/upload_image/look_images_widget.dart
@@ -170,6 +170,7 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
 
   /// Uint8List 转临时 File 并且上传到oss并返回访问路径
   Future<String?> uint8ListToTempFile(Uint8List uint8List, {String fileName = "temp_file"}) async {
+    if (uint8List.isEmpty) return null;
     try {
       // 1. 获取临时存储目录（跨平台兼容）
       Directory tempDir = await getTemporaryDirectory();