diff --git a/Assets/YooAsset/Runtime/FileSystem/DefaultBuildinFileSystem/DefaultBuildinFileSystem.cs b/Assets/YooAsset/Runtime/FileSystem/DefaultBuildinFileSystem/DefaultBuildinFileSystem.cs
index 6ffa508f..c6ea39aa 100644
--- a/Assets/YooAsset/Runtime/FileSystem/DefaultBuildinFileSystem/DefaultBuildinFileSystem.cs
+++ b/Assets/YooAsset/Runtime/FileSystem/DefaultBuildinFileSystem/DefaultBuildinFileSystem.cs
@@ -89,6 +89,11 @@ namespace YooAsset
         /// </summary>
         public string CopyBuildinPackageManifestDestRoot { private set; get; }
 
+        /// <summary>
+        /// 自定义参数：解压文件系统的根目录
+        /// </summary>
+        public string UnpackFileSystemRoot { private set; get; }
+
         /// <summary>
         ///  自定义参数：解密服务接口的实例类
         /// </summary>
@@ -190,6 +195,10 @@ namespace YooAsset
             {
                 CopyBuildinPackageManifestDestRoot = (string)value;
             }
+            else if (name == FileSystemParametersDefine.UNPACK_FILE_SYSTEM_ROOT)
+            {
+                UnpackFileSystemRoot = (string)value;
+            }
             else if (name == FileSystemParametersDefine.DECRYPTION_SERVICES)
             {
                 DecryptionServices = (IDecryptionServices)value;
@@ -226,7 +235,7 @@ namespace YooAsset
             _unpackFileSystem.SetParameter(FileSystemParametersDefine.APPEND_FILE_EXTENSION, AppendFileExtension);
             _unpackFileSystem.SetParameter(FileSystemParametersDefine.DECRYPTION_SERVICES, DecryptionServices);
             _unpackFileSystem.SetParameter(FileSystemParametersDefine.COPY_LOCAL_FILE_SERVICES, CopyLocalFileServices);
-            _unpackFileSystem.OnCreate(packageName, null);
+            _unpackFileSystem.OnCreate(packageName, UnpackFileSystemRoot);
         }
         public virtual void OnDestroy()
         {
diff --git a/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs b/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs
index 0f4829ab..ae85ea29 100644
--- a/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs
+++ b/Assets/YooAsset/Runtime/FileSystem/FileSystemParametersDefine.cs
@@ -26,5 +26,6 @@ namespace YooAsset
         public const string COPY_BUILDIN_PACKAGE_MANIFEST = "COPY_BUILDIN_PACKAGE_MANIFEST";
         public const string COPY_BUILDIN_PACKAGE_MANIFEST_DEST_ROOT = "COPY_BUILDIN_PACKAGE_MANIFEST_DEST_ROOT";
         public const string COPY_LOCAL_FILE_SERVICES = "COPY_LOCAL_FILE_SERVICES";
+        public const string UNPACK_FILE_SYSTEM_ROOT = "UNPACK_FILE_SYSTEM_ROOT";
     }
 }
\ No newline at end of file