diff --git a/src/Starward/Pages/Setting/DownloadSettingPage.xaml.cs b/src/Starward/Pages/Setting/DownloadSettingPage.xaml.cs
index cffec065c..7ca596111 100644
--- a/src/Starward/Pages/Setting/DownloadSettingPage.xaml.cs
+++ b/src/Starward/Pages/Setting/DownloadSettingPage.xaml.cs
@@ -71,10 +71,11 @@ partial void OnDefaultInstallPathChanged(string? value)
     partial void OnSpeedLimitChanged(int value)
     {
         InstallGameManager.SpeedLimitBytesPerSecond = value == 0 ? int.MaxValue : value * 1024;
+        var SpeedLimitBytesPerPeriod = Math.Max((int)Math.Floor((double)InstallGameManager.SpeedLimitBytesPerSecond / 20), 1 << 14);
         InstallGameManager.rateLimiter = new TokenBucketRateLimiter(new TokenBucketRateLimiterOptions
         {
-            TokensPerPeriod = InstallGameManager.SpeedLimitBytesPerSecond,
-            ReplenishmentPeriod = TimeSpan.FromSeconds(1),
+            TokensPerPeriod = SpeedLimitBytesPerPeriod,
+            ReplenishmentPeriod = SpeedLimitBytesPerPeriod == 1 << 14 ? TimeSpan.FromSeconds((1 << 14) / (double)InstallGameManager.SpeedLimitBytesPerSecond) : TimeSpan.FromMilliseconds(50),
             TokenLimit = InstallGameManager.SpeedLimitBytesPerSecond,
             QueueProcessingOrder = QueueProcessingOrder.OldestFirst,
             AutoReplenishment = true
diff --git a/src/Starward/Services/Download/InstallGameManager.cs b/src/Starward/Services/Download/InstallGameManager.cs
index b24da6a75..2b10d7bdc 100644
--- a/src/Starward/Services/Download/InstallGameManager.cs
+++ b/src/Starward/Services/Download/InstallGameManager.cs
@@ -22,10 +22,11 @@ private InstallGameManager()
         _services = new();
         int speed = AppConfig.SpeedLimitKBPerSecond * 1024;
         SpeedLimitBytesPerSecond = speed == 0 ? int.MaxValue : speed;
+        var SpeedLimitBytesPerPeriod = Math.Max((int)Math.Floor((double)SpeedLimitBytesPerSecond / 20), 1 << 14);
         rateLimiter = new TokenBucketRateLimiter(new TokenBucketRateLimiterOptions
         {
-            TokensPerPeriod = SpeedLimitBytesPerSecond,
-            ReplenishmentPeriod = TimeSpan.FromSeconds(1),
+            TokensPerPeriod = SpeedLimitBytesPerPeriod,
+            ReplenishmentPeriod = SpeedLimitBytesPerPeriod == 1 << 14 ? TimeSpan.FromSeconds((1 << 14) / (double)SpeedLimitBytesPerSecond) : TimeSpan.FromMilliseconds(50), // 这是一个CPU密集型任务，极低间隔会严重影响性能
             TokenLimit = SpeedLimitBytesPerSecond,
             QueueProcessingOrder = QueueProcessingOrder.OldestFirst,
             AutoReplenishment = true
@@ -44,7 +45,7 @@ private InstallGameManager()
     public static int SpeedLimitBytesPerSecond { get; set; }
 
 
-    public static RateLimiter rateLimiter;
+    public static TokenBucketRateLimiter rateLimiter;
 
 
     private long _lastTimeStamp;
diff --git a/src/Starward/Services/Download/InstallGameService.cs b/src/Starward/Services/Download/InstallGameService.cs
index beb6c7a24..2caf02c6d 100644
--- a/src/Starward/Services/Download/InstallGameService.cs
+++ b/src/Starward/Services/Download/InstallGameService.cs
@@ -1208,10 +1208,10 @@ protected async Task DownloadItemAsync(InstallGameItem item, CancellationToken c
                     do
                     {
                         lease = await InstallGameManager.rateLimiter.AcquireAsync(buffer.Length, cancellationToken).ConfigureAwait(false);
-                        if (!lease.IsAcquired)
-                        {
+                        if (lease.TryGetMetadata(MetadataName.RetryAfter, out TimeSpan retryAfter))
+                            await Task.Delay(retryAfter, cancellationToken).ConfigureAwait(false);
+                        else if (!lease.IsAcquired)
                             await Task.Delay(1, cancellationToken).ConfigureAwait(false);
-                        }
                     } while (!lease.IsAcquired);
                     await fs.WriteAsync(buffer.AsMemory(0, length), cancellationToken).ConfigureAwait(false);
                     Interlocked.Add(ref _finishBytes, length);