diff --git a/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/DefaultEditorFileSystem.cs b/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/DefaultEditorFileSystem.cs
index 33cf37c8..0e17481f 100644
--- a/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/DefaultEditorFileSystem.cs
+++ b/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/DefaultEditorFileSystem.cs
@@ -36,6 +36,17 @@ namespace YooAsset
             }
         }
 
+        #region 自定义参数
+        /// <summary>
+        /// 异步模拟加载最小帧数
+        /// </summary>
+        public int _asyncSimulateMinFrame = 1;
+
+        /// <summary>
+        /// 异步模拟加载最大帧数
+        /// </summary>
+        public int _asyncSimulateMaxFrame = 1;
+        #endregion
 
         public DefaultEditorFileSystem()
         {
@@ -86,7 +97,18 @@ namespace YooAsset
 
         public virtual void SetParameter(string name, object value)
         {
-            YooLogger.Warning($"Invalid parameter : {name}");
+            if (name == FileSystemParametersDefine.ASYNC_SIMULATE_MIN_FRAME)
+            {
+                _asyncSimulateMinFrame = (int)value;
+            }
+            else if (name == FileSystemParametersDefine.ASYNC_SIMULATE_MAX_FRAME)
+            {
+                _asyncSimulateMaxFrame = (int)value;
+            }
+            else
+            {
+                YooLogger.Warning($"Invalid parameter : {name}");
+            }
         }
         public virtual void OnCreate(string packageName, string rootDirectory)
         {
@@ -131,7 +153,7 @@ namespace YooAsset
         {
             throw new System.NotImplementedException();
         }
-        
+
         #region 内部方法
         public string GetEditorPackageVersionFilePath()
         {
@@ -148,6 +170,15 @@ namespace YooAsset
             string fileName = YooAssetSettingsData.GetManifestBinaryFileName(PackageName, packageVersion);
             return PathUtility.Combine(FileRoot, fileName);
         }
+        public int GetAsyncSimulateFrame()
+        {
+            if (_asyncSimulateMinFrame > _asyncSimulateMaxFrame)
+            {
+                _asyncSimulateMinFrame = _asyncSimulateMaxFrame;
+            }
+
+            return UnityEngine.Random.Range(_asyncSimulateMinFrame, _asyncSimulateMaxFrame + 1);
+        }
         #endregion
     }
 }
\ No newline at end of file
diff --git a/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/Operation/DEFSLoadBundleOperation.cs b/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/Operation/DEFSLoadBundleOperation.cs
index ffa76ab7..b408f669 100644
--- a/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/Operation/DEFSLoadBundleOperation.cs
+++ b/Assets/YooAsset/Runtime/FileSystem/DefaultEditorFileSystem/Operation/DEFSLoadBundleOperation.cs
@@ -3,8 +3,19 @@ namespace YooAsset
 {
     internal class DEFSLoadBundleOperation : FSLoadBundleOperation
     {
+        protected enum ESteps
+        {
+            None,
+            DownloadFile,
+            LoadAssetBundle,
+            CheckResult,
+            Done,
+        }
+
         private readonly DefaultEditorFileSystem _fileSystem;
         private readonly PackageBundle _bundle;
+        private int _asyncSimulateFrame;
+        private ESteps _steps = ESteps.None;
 
         internal DEFSLoadBundleOperation(DefaultEditorFileSystem fileSystem, PackageBundle bundle)
         {
@@ -13,16 +24,53 @@ namespace YooAsset
         }
         internal override void InternalOnStart()
         {
-            DownloadProgress = 1f;
-            DownloadedBytes = _bundle.FileSize;
-            Status = EOperationStatus.Succeed;
-            Result = new VirtualBundle(_fileSystem, _bundle);
+            _steps = ESteps.DownloadFile;
         }
         internal override void InternalOnUpdate()
         {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.DownloadFile)
+            {
+                _asyncSimulateFrame = _fileSystem.GetAsyncSimulateFrame();
+                DownloadProgress = 1f;
+                DownloadedBytes = _bundle.FileSize;
+                _steps = ESteps.LoadAssetBundle;
+            }
+
+            if (_steps == ESteps.LoadAssetBundle)
+            {
+                if (IsWaitForAsyncComplete)
+                {
+                    _steps = ESteps.CheckResult;
+                }
+                else
+                {
+                    if (_asyncSimulateFrame <= 0)
+                        _steps = ESteps.CheckResult;
+                    else
+                        _asyncSimulateFrame--;
+                }
+            }
+
+            if (_steps == ESteps.CheckResult)
+            {
+                _steps = ESteps.Done;
+                Result = new VirtualBundle(_fileSystem, _bundle);
+                Status = EOperationStatus.Succeed;
+            }
         }
         internal override void InternalWaitForAsyncComplete()
         {
+            while (true)
+            {
+                if (ExecuteWhileDone())
+                {
+                    _steps = ESteps.Done;
+                    break;
+                }
+            }
         }
         public override void AbortDownloadOperation()
         {
diff --git a/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs b/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs
index e197bc3a..17f88812 100644
--- a/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs
+++ b/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs
@@ -1,7 +1,7 @@
 
 namespace YooAsset
 {
-    internal class FileSystemParametersDefine
+    public class FileSystemParametersDefine
     {
         public const string FILE_VERIFY_LEVEL = "FILE_VERIFY_LEVEL";
         public const string REMOTE_SERVICES = "REMOTE_SERVICES";
@@ -11,5 +11,7 @@ namespace YooAsset
         public const string DISABLE_UNITY_WEB_CACHE = "DISABLE_UNITY_WEB_CACHE";
         public const string RESUME_DOWNLOAD_MINMUM_SIZE = "RESUME_DOWNLOAD_MINMUM_SIZE";
         public const string RESUME_DOWNLOAD_RESPONSE_CODES = "RESUME_DOWNLOAD_RESPONSE_CODES";
+        public const string ASYNC_SIMULATE_MIN_FRAME = "ASYNC_SIMULATE_MIN_FRAME";
+        public const string ASYNC_SIMULATE_MAX_FRAME = "ASYNC_SIMULATE_MAX_FRAME";
     }
 }
\ No newline at end of file