diff --git a/src/MDriveSync.Core/DownloadManager.cs b/src/MDriveSync.Core/DownloadManager.cs
index 519a4a4..5796c53 100644
--- a/src/MDriveSync.Core/DownloadManager.cs
+++ b/src/MDriveSync.Core/DownloadManager.cs
@@ -485,7 +485,7 @@ private async void StartDownloadTask(DownloadTask downloadTask)
                             throw new LogicException("未找到指定的任务配置");
                         }
 
-                        var fileName = downloadTask.Name;
+                        var fileName = downloadTask.Name?.TrimSuffix(".e");
                         if (!string.IsNullOrWhiteSpace(downloadTask.FilePath))
                         {
                             fileName = Path.GetFileName(downloadTask.FilePath);