diff --git a/pkg/serverconfigs/http_cache_storage_file.go b/pkg/serverconfigs/http_cache_storage_file.go
index f16958c..227eb0b 100644
--- a/pkg/serverconfigs/http_cache_storage_file.go
+++ b/pkg/serverconfigs/http_cache_storage_file.go
@@ -1,7 +1,9 @@
 package serverconfigs
 
+// 文件缓存存储策略
 type HTTPFileCacheStorage struct {
-	Dir string `yaml:"dir" json:"dir"` // 目录
+	Dir          string           `yaml:"dir" json:"dir"`                   // 目录
+	MemoryPolicy *HTTPCachePolicy `yaml:"memoryPolicy" json:"memoryPolicy"` // 内存二级缓存
 }
 
 func (this *HTTPFileCacheStorage) Init() error {