diff --git a/Assets/YooAsset/Runtime/PackageSystem/PlayMode/EditorSimulateModeImpl.cs b/Assets/YooAsset/Runtime/PackageSystem/PlayMode/EditorSimulateModeImpl.cs
index 82acded..57d7da8 100644
--- a/Assets/YooAsset/Runtime/PackageSystem/PlayMode/EditorSimulateModeImpl.cs
+++ b/Assets/YooAsset/Runtime/PackageSystem/PlayMode/EditorSimulateModeImpl.cs
@@ -138,6 +138,11 @@ namespace YooAsset
 			return result;
 		}
 
+		public List<PackageBundle> GetNeedDownloadTagsRawFiles(string[] tags)
+		{
+			return new List<PackageBundle>();
+		}
+
 		#endregion
 	}
 }
\ No newline at end of file
diff --git a/Assets/YooAsset/Runtime/PackageSystem/PlayMode/HostPlayModeImpl.cs b/Assets/YooAsset/Runtime/PackageSystem/PlayMode/HostPlayModeImpl.cs
index f88bce1..1e6deff 100644
--- a/Assets/YooAsset/Runtime/PackageSystem/PlayMode/HostPlayModeImpl.cs
+++ b/Assets/YooAsset/Runtime/PackageSystem/PlayMode/HostPlayModeImpl.cs
@@ -377,6 +377,33 @@ namespace YooAsset
 			return result;
 		}
 
+		public List<PackageBundle> GetNeedDownloadTagsRawFiles(string[] tags)
+		{
+			List<PackageBundle> neetDownloadList = new List<PackageBundle>(200);
+			foreach (PackageBundle bundle in _activeManifest.BundleList)
+			{
+				if (IsCachedPackageBundle(bundle))
+				{
+					continue;
+				}
+
+				if (IsBuildinPackageBundle(bundle))
+				{
+					continue;
+				}
+
+				if (!bundle.HasAnyTags())
+				{
+					continue;
+				}
+
+				bundle.HasTag(tags);
+				neetDownloadList.Add(bundle);
+			}
+
+			return neetDownloadList;
+		}
+
 		#endregion
 	}
 }
\ No newline at end of file
diff --git a/Assets/YooAsset/Runtime/PackageSystem/PlayMode/OfflinePlayModeImpl.cs b/Assets/YooAsset/Runtime/PackageSystem/PlayMode/OfflinePlayModeImpl.cs
index c19f841..680e5fc 100644
--- a/Assets/YooAsset/Runtime/PackageSystem/PlayMode/OfflinePlayModeImpl.cs
+++ b/Assets/YooAsset/Runtime/PackageSystem/PlayMode/OfflinePlayModeImpl.cs
@@ -139,6 +139,11 @@ namespace YooAsset
 			return new List<PackageBundle>();
 		}
 
+		public List<PackageBundle> GetNeedDownloadTagsRawFiles(string[] tags)
+		{
+			return new List<PackageBundle>();
+		}
+
 		#endregion
 	}
 }
\ No newline at end of file
diff --git a/Assets/YooAsset/Runtime/PackageSystem/ResourcePackage.cs b/Assets/YooAsset/Runtime/PackageSystem/ResourcePackage.cs
index 7182387..4be848f 100644
--- a/Assets/YooAsset/Runtime/PackageSystem/ResourcePackage.cs
+++ b/Assets/YooAsset/Runtime/PackageSystem/ResourcePackage.cs
@@ -866,6 +866,19 @@ namespace YooAsset
 			OperationSystem.StartOperation(operation);
 			return operation;
 		}
+
+		public long GetNeedDownloadTagsRawFileSize(string[] tags)
+		{
+			DebugCheckInitialize();
+			var list=_playModeServices.GetNeedDownloadTagsRawFiles(tags);
+			long size = 0;
+			foreach (PackageBundle packageBundle in list)
+			{
+				size += packageBundle.FileSize;
+			}
+
+			return size;
+		}
 		#endregion
 	}
 }
\ No newline at end of file
diff --git a/Assets/YooAsset/Runtime/Services/Internal/IPlayModeServices.cs b/Assets/YooAsset/Runtime/Services/Internal/IPlayModeServices.cs
index 042de3d..7b8d58f 100644
--- a/Assets/YooAsset/Runtime/Services/Internal/IPlayModeServices.cs
+++ b/Assets/YooAsset/Runtime/Services/Internal/IPlayModeServices.cs
@@ -40,5 +40,6 @@ namespace YooAsset
 		ResourceUnpackerOperation CreateResourceUnpackerByTags(string[] tags, int upackingMaxNumber, int failedTryAgain, int timeout);
 		
 		List<PackageBundle> GetCachedTagsRawFiles(string[] tags);
+		List<PackageBundle> GetNeedDownloadTagsRawFiles(string[] tags);
 	}
 }
\ No newline at end of file