diff --git a/pkg/errorx/lru.go b/pkg/errorx/lru.go
index 569e563..95952eb 100644
--- a/pkg/errorx/lru.go
+++ b/pkg/errorx/lru.go
@@ -3,3 +3,7 @@ package errorx
 func LruNotWorkFuncEventErr() error {
 	return New("the event haven't work of function")
 }
+
+func KeyBaseIsNilErr() error {
+	return New("key base not is nil")
+}
diff --git a/pkg/lru/define.go b/pkg/lru/define.go
index 6c8ede4..c5cedb2 100644
--- a/pkg/lru/define.go
+++ b/pkg/lru/define.go
@@ -33,7 +33,7 @@ const (
 type CacheInterface interface {
 	Del() error
 	Get(key *proto.BaseKey) (structure.KeyBaseInterface, bool)
-	Add(key *proto.BaseKey, val structure.KeyBaseInterface)
+	Add(key *proto.BaseKey, val structure.KeyBaseInterface) error
 	UpdateLruSize(length structure.UpdateLength)
 	DelByKey(key *proto.BaseKey) error
 	DelToClearSize() error
diff --git a/pkg/lru/lru.go b/pkg/lru/lru.go
index a8682ad..cb5c9b0 100644
--- a/pkg/lru/lru.go
+++ b/pkg/lru/lru.go
@@ -108,7 +108,11 @@ func (lru *SingleCache) GetDriver() event.DriverInterface {
 }
 
 //Add 增加
-func (lru *SingleCache) Add(key *proto.BaseKey, val structure.KeyBaseInterface) {
+func (lru *SingleCache) Add(key *proto.BaseKey, val structure.KeyBaseInterface) error {
+
+	if key == nil {
+		return errorx.KeyBaseIsNilErr()
+	}
 
 	exp := lru.lruTtlManage.setKeys(key)
 	keyBaseVal := &keyBaseValue{
@@ -119,17 +123,22 @@ func (lru *SingleCache) Add(key *proto.BaseKey, val structure.KeyBaseInterface)
 	if elVal, ok := lru.lruMap[key.Key]; ok {
 		lru.li.MoveToFront(elVal)
 		elVal.Value = keyBaseVal
-		return
+		return nil
 	}
 	valEl := lru.li.PushFront(keyBaseVal)
 	lru.lruMap[key.Key] = valEl
 	//增加大小
 	lru.UpdateLruSize(structure.UpdateLength(valEl.Value.(*keyBaseValue).val.SizeByte()))
+	return nil
 }
 
 // Get 查找key对应的value
 func (lru *SingleCache) Get(key *proto.BaseKey) (structure.KeyBaseInterface, bool) {
 
+	if key == nil {
+		return nil, false
+	}
+
 	if elVal, ok := lru.lruMap[key.Key]; ok {
 		lru.li.MoveToFront(elVal)
 		return elVal.Value.(*keyBaseValue).val, true
@@ -152,6 +161,11 @@ func (lru *SingleCache) Del() error {
 
 //DelByKey 根据key删除
 func (lru *SingleCache) DelByKey(key *proto.BaseKey) error {
+
+	if key == nil {
+		return errorx.KeyBaseIsNilErr()
+	}
+
 	if lru.lruMap == nil {
 		return errorx.New("lru is nil")
 	}
@@ -194,6 +208,10 @@ func (lru *SingleCache) DelToClearSize() error {
 // 更新过期时间
 func (lru *SingleCache) UpdateTTl(key *proto.BaseKey) error {
 
+	if key == nil {
+		return errorx.KeyBaseIsNilErr()
+	}
+
 	if elVal, ok := lru.lruMap[key.Key]; ok {
 		expire := lru.lruTtlManage.setKeys(key)
 		elVal.Value.(*keyBaseValue).expire = expire