diff --git a/web-to-ppt/background.js b/web-to-ppt/background.js
index d5f36db..6383c05 100644
--- a/web-to-ppt/background.js
+++ b/web-to-ppt/background.js
@@ -177,7 +177,12 @@ chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
       const stored = await chrome.storage.session.get(['pptxBase64', 'pptxFilename']);
       if (!stored.pptxBase64) throw new Error('没有待下载的数据');
       const dataUrl = 'data:application/vnd.openxmlformats-officedocument.presentationml.presentation;base64,' + stored.pptxBase64;
-      await chrome.downloads.download({ url: dataUrl, filename: stored.pptxFilename });
+      // 先尝试弹出保存对话框，失败则直接下载到默认文件夹
+      try {
+        await chrome.downloads.download({ url: dataUrl, filename: stored.pptxFilename, saveAs: true });
+      } catch (e) {
+        await chrome.downloads.download({ url: dataUrl, filename: stored.pptxFilename });
+      }
       await chrome.storage.session.remove(['pptxBase64', 'pptxFilename']);
       return { ok: true };
     })()