diff --git a/src/daemon/toolchain_templates.py b/src/daemon/toolchain_templates.py
index e767188..9dc5b81 100644
--- a/src/daemon/toolchain_templates.py
+++ b/src/daemon/toolchain_templates.py
@@ -87,7 +87,8 @@ def render_template(name: str, variables: Dict[str, str]) -> str:
 def clear_cache() -> None:
     """清空模板缓存（用于测试或热更新）"""
     _template_cache.clear()
-    _steps_cache.clear()
+    global _steps_cache
+    _steps_cache = None  # 重置为 None，强制下次 reload
 
 
 # ---------------------------------------------------------------------------