diff --git a/app/adapters/system/plugin/package.py b/app/adapters/system/plugin/package.py
index 90d4730aa..3565b3581 100644
--- a/app/adapters/system/plugin/package.py
+++ b/app/adapters/system/plugin/package.py
@@ -1232,10 +1232,10 @@ class PluginPackageManager:
                     elif res.status_code != 200:
                         return False, f"下载文件 {item.get('path')} 失败：{res.status_code}"
 
-                    # 创建插件文件夹并写入文件
+                    # GitHub 文件列表同时承载 Python 源码和 wheel 等二进制制品，统一按原始字节写入
                     file_path.parent.mkdir(parents=True, exist_ok=True)
-                    with open(file_path, "w", encoding="utf-8") as f:
-                        f.write(res.text)
+                    with open(file_path, "wb") as f:
+                        f.write(res.content)
                     logger.debug(f"文件 {item.get('path')} 下载成功，保存路径：{file_path}")
                 else:
                     # 如果是子目录，则将子目录内容加入栈中继续处理
@@ -1674,11 +1674,11 @@ class PluginPackageManager:
                     elif res.status_code != 200:
                         return False, f"下载文件 {item.get('path')} 失败：{res.status_code}"
 
-                    # 创建插件文件夹并写入文件
+                    # GitHub 文件列表同时承载 Python 源码和 wheel 等二进制制品，统一按原始字节写入
                     file_path = AsyncPath(resolved_path)
                     await file_path.parent.mkdir(parents=True, exist_ok=True)
-                    async with aiofiles.open(file_path, "w", encoding="utf-8") as f:
-                        await f.write(res.text)
+                    async with aiofiles.open(file_path, "wb") as f:
+                        await f.write(res.content)
                     logger.debug(f"文件 {item.get('path')} 下载成功，保存路径：{file_path}")
                 else:
                     # 如果是子目录，则将子目录内容加入栈中继续处理
diff --git a/tests/test_plugin_package_manager.py b/tests/test_plugin_package_manager.py
index 5efbf39ac..1cff91503 100644
--- a/tests/test_plugin_package_manager.py
+++ b/tests/test_plugin_package_manager.py
@@ -182,13 +182,14 @@ async def test_file_list_download_rejects_traversal_directory_names(
 
 
 @pytest.mark.asyncio
-async def test_file_list_download_maps_valid_paths_into_injected_plugin_root(
+async def test_file_list_download_preserves_binary_payload_in_injected_plugin_root(
     monkeypatch,
     tmp_path,
 ):
-    """同步与异步文件列表都只写入显式装配的插件根目录。"""
+    """同步与异步文件列表都应在受控根目录内保留原始文件字节。"""
     plugin_root = tmp_path / "plugins"
-    response = SimpleNamespace(status_code=200, text="payload")
+    payload = b"\x00\xffwheel-payload"
+    response = SimpleNamespace(status_code=200, content=payload, text="wrong-text")
     manager = PluginPackageManager(source=Mock(), plugin_root=plugin_root)
     monkeypatch.setattr(
         manager,
@@ -211,9 +212,7 @@ async def test_file_list_download_maps_valid_paths_into_injected_plugin_root(
     assert await manager._PluginPackageManager__async_download_files(
         "DemoPlugin", [item], "owner/repo", "v2"
     ) == (True, "")
-    assert (plugin_root / "demoplugin" / "nested" / "file.py").read_text(
-        encoding="utf-8"
-    ) == "payload"
+    assert (plugin_root / "demoplugin" / "nested" / "file.py").read_bytes() == payload
 
 
 def test_checkpoint_does_not_scan_native_dependencies(monkeypatch, tmp_path):