diff --git a/Plain Craft Launcher 2/Modules/Network/Loaders/LoaderDownload.cs b/Plain Craft Launcher 2/Modules/Network/Loaders/LoaderDownload.cs
index d2f0db0b2..97a8cf5ef 100644
--- a/Plain Craft Launcher 2/Modules/Network/Loaders/LoaderDownload.cs	
+++ b/Plain Craft Launcher 2/Modules/Network/Loaders/LoaderDownload.cs	
@@ -137,6 +137,9 @@ private async Task ProcessFileAsync(PCL.Network.DownloadFile file, CancellationT
             {
                 await FileDownloader.Download(file.Urls, file.LocalPath, file.UseBrowserUserAgent, file.CustomUserAgent,
                     cancellationToken, enableParallelChunks, file).ConfigureAwait(false);
+                var checkError = file.Check?.Check(file.LocalPath);
+                if (checkError is not null)
+                    throw new IOException($"下载文件校验失败：{checkError}");
                 break;
             }
             catch (OperationCanceledException)