diff --git a/Runtime/GuruCore/Runtime/Ads/ADServiceBase.cs b/Runtime/GuruCore/Runtime/Ads/ADServiceBase.cs
index 2204d98..7169ba6 100644
--- a/Runtime/GuruCore/Runtime/Ads/ADServiceBase.cs
+++ b/Runtime/GuruCore/Runtime/Ads/ADServiceBase.cs
@@ -22,6 +22,8 @@ namespace Guru
         public bool IsInitialized => MaxSdk.IsInitialized() || _isServiceStarted;
         protected bool IsNetworkEnabled => Application.internetReachability != NetworkReachability.NotReachable;
 
+        private const int MAX_ADS_RELOAD_INTERVAL = 6; // 广告加载最高时间为 2 的 6 次方 = 64秒
+
         private bool _isServiceStarted;
 
         protected Action _onSdkInitReady;
@@ -149,6 +151,13 @@ namespace Guru
             set => Model.BuyNoAds = value;
         }
 
+        private float GetRetryDelaySeconds(int retryCount)
+        {
+            // 最低 2^retryCount 秒
+            // 最高 2^6 = 64 秒
+            return (float)Math.Pow(2, Math.Min(MAX_ADS_RELOAD_INTERVAL, retryCount));
+        }
+
         #region Lifecycele
         
         public void OnAppPaused(bool paused)
@@ -511,8 +520,8 @@ namespace Guru
             this.LogError(
                 $"OnInterstitialFailedEvent AdLoadFailureInfo:{errorInfo.AdLoadFailureInfo}, Message: {errorInfo.Message}");
             _interstitialRetryAttempt++;
-            double retryDelay = Math.Pow(2, Math.Min(3, _interstitialRetryAttempt));
-            DelayCall((float)retryDelay, RequestInterstitialAD);
+            float retryDelay = GetRetryDelaySeconds(_interstitialRetryAttempt);
+            DelayCall(retryDelay, RequestInterstitialAD);
             // Analytics.ADIadsFailed(adUnitId, (int)errorInfo.Code, GetAdsLoadDuration(ref _iadsLoadStartTime), _iadsCategory);
             Analytics.ADIadsFailed(AdParams.Build(adUnitId,
                 duration: GetAdsLoadDuration(ref _iadsLoadStartTime), category: _iadsCategory,
@@ -669,8 +678,8 @@ namespace Guru
                 errorCode: (int)errorInfo.Code,
                 waterfallName: errorInfo?.WaterfallInfo?.Name ?? ""));
             _rewardRetryAttempt++;
-            double retryDelay = Math.Pow(2, Math.Min(3, _rewardRetryAttempt));
-            DelayCall((float)retryDelay, RequestRewardedAD);
+            float retryDelay = GetRetryDelaySeconds(_rewardRetryAttempt);
+            DelayCall(retryDelay, RequestRewardedAD);
 
             OnRewardFailed?.Invoke();
         }