diff --git a/src/TelegramPanel.Web/Components/Pages/Accounts.razor b/src/TelegramPanel.Web/Components/Pages/Accounts.razor
index 9835174..fbbb826 100644
--- a/src/TelegramPanel.Web/Components/Pages/Accounts.razor
+++ b/src/TelegramPanel.Web/Components/Pages/Accounts.razor
@@ -958,7 +958,8 @@
             return;
 
         var qs = string.Join(",", ids);
-        Navigation.NavigateTo($"/downloads/accounts.zip?ids={qs}&format={format}", forceLoad: true);
+        var ts = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
+        Navigation.NavigateTo($"/downloads/accounts.zip?ids={qs}&format={format}&ts={ts}", forceLoad: true);
     }
 
     private async Task<string?> SelectExportFormatAsync(int accountCount, string scopeLabel)
diff --git a/src/TelegramPanel.Web/Program.cs b/src/TelegramPanel.Web/Program.cs
index 463c034..b190113 100644
--- a/src/TelegramPanel.Web/Program.cs
+++ b/src/TelegramPanel.Web/Program.cs
@@ -864,6 +864,11 @@ var accountsZipDownload = app.MapGet("/downloads/accounts.zip", async (
     var zipBytes = await exporter.BuildAccountsZipAsync(accounts, cancellationToken, format);
     var formatName = format == AccountExportFormat.Tdata ? "tdata" : "telethon";
     var fileName = $"telegram-panel-accounts-{formatName}-{DateTime.UtcNow:yyyyMMdd-HHmmss}.zip";
+
+    // 下载文件禁止缓存，避免浏览器复用旧的 accounts.zip 导致“重复拿到旧导出包”。
+    http.Response.Headers.CacheControl = "no-store, no-cache, must-revalidate, max-age=0";
+    http.Response.Headers.Pragma = "no-cache";
+    http.Response.Headers.Expires = "0";
     return Results.File(zipBytes, "application/zip", fileName);
 }).DisableAntiforgery();
 if (adminAuthEnabled)