diff --git a/openplatform/openplatform.go b/openplatform/openplatform.go
index 80fb82e..5c509b9 100644
--- a/openplatform/openplatform.go
+++ b/openplatform/openplatform.go
@@ -18,9 +18,6 @@ type OpenPlatform struct {
 
 // NewOpenPlatform new openplatform
 func NewOpenPlatform(cfg *config.Config) *OpenPlatform {
-	if cfg.Cache == nil {
-		panic("cache 未设置")
-	}
 	ctx := &context.Context{
 		Config: cfg,
 	}
diff --git a/wechat.go b/wechat.go
index fc98400..e003dac 100644
--- a/wechat.go
+++ b/wechat.go
@@ -68,6 +68,9 @@ func (wc *Wechat) GetPay(cfg *payConfig.Config) *pay.Pay {
 
 // GetOpenPlatform 获取微信开放平台的实例
 func (wc *Wechat) GetOpenPlatform(cfg *openConfig.Config) *openplatform.OpenPlatform {
+	if cfg.Cache == nil {
+		cfg.Cache = wc.cache
+	}
 	return openplatform.NewOpenPlatform(cfg)
 }