diff --git a/src/downloadworker.cpp b/src/downloadworker.cpp
index 0b33d35..cb6f63d 100644
--- a/src/downloadworker.cpp
+++ b/src/downloadworker.cpp
@@ -99,15 +99,18 @@ void DownloadController::startDownload(const QString &url)
             gennerateDomain(domains);
             // qDebug() << domains << domains.size();
         }
-        QDir tmpdir("/tmp/spark-store/");
+
         QString aria2Command = "-d";
         QString aria2Urls = "";
         QString aria2Verbose = "--summary-interval=1";
-        QString aria2Threads = "--split=16";
+        QString aria2Threads = "--split=2";  // 仅使用最快的两个镜像源
         QString aria2NoConfig = "--no-conf";
         QString aria2NoSeeds = "--seed-time=0";
         QStringList command;
         QString downloadDir = "/tmp/spark-store/";
+        QString aira2URLSelector = "--uri-selector=adaptive";
+        QString aria2StreamPiece = "--stream-piece-selector=default";
+        QString aria2ConnectionPerServer = "--max-connection-per-server=4";
 
         if (useMetalink){
             command.append(metaUrl.toUtf8());
@@ -128,6 +131,9 @@ void DownloadController::startDownload(const QString &url)
         command.append(aria2Verbose.toUtf8());
         command.append(aria2NoConfig.toUtf8());
         command.append(aria2Threads.toUtf8());
+        command.append(aira2URLSelector.toUtf8());
+        command.append(aria2StreamPiece.toUtf8());
+        command.append(aria2ConnectionPerServer.toUtf8());
         if (useMetalink){
             command.append(aria2NoSeeds.toUtf8());
         }