diff --git a/mycache/cache2go/cachetable.go b/mycache/cache2go/cachetable.go
index 5e40f32..7ca5ddc 100644
--- a/mycache/cache2go/cachetable.go
+++ b/mycache/cache2go/cachetable.go
@@ -275,6 +275,24 @@ func (table *CacheTable) NotFoundAdd(key interface{}, lifeSpan time.Duration, da
 	return true
 }
 
+// Value returns an item from the cache and marks it to be kept alive. You can
+// pass additional arguments to your DataLoader callback function.
+func (table *CacheTable) Refresh(key interface{}, lifeSpan time.Duration) error {
+	table.RLock()
+	r, ok := table.items[key]
+	table.RUnlock()
+
+	if ok {
+		// Update access counter and timestamp.
+		table.Add(key, lifeSpan, r.data)
+		r.KeepAlive()
+		// r.lifeSpan = lifeSpan
+		return nil
+	}
+
+	return ErrKeyNotFound
+}
+
 // Value returns an item from the cache and marks it to be kept alive. You can
 // pass additional arguments to your DataLoader callback function.
 func (table *CacheTable) Value(key interface{}, args ...interface{}) (*CacheItem, error) {
diff --git a/mycache/mycache.go b/mycache/mycache.go
index 52c3c91..2fb3d9b 100644
--- a/mycache/mycache.go
+++ b/mycache/mycache.go
@@ -24,6 +24,7 @@ type CacheIFS interface {
 	TryLock(key interface{}, value interface{}, lifeSpan time.Duration) (err error) //  试着加锁
 	Unlock(key interface{}) (err error)                                             // 解锁
 	GetKeyS(key interface{}) ([]string, error)                                      // 查询所有key
+	Refresh(key interface{}, lifeSpan time.Duration) error                          // 更新时间
 }
 
 // MyCache 内存缓存
@@ -111,6 +112,14 @@ func (mc *MyCache) Unlock(key interface{}) (err error) {
 	return mc.Delete(key)
 }
 
+// Refresh 更新时间
+func (mc *MyCache) Refresh(key interface{}, lifeSpan time.Duration) error {
+	mc.mtx.Lock()
+	defer mc.mtx.Unlock()
+
+	return mc.cache.Refresh(key, lifeSpan)
+}
+
 func encodeValue(value interface{}) []byte {
 	data, _ := serializing.Encode(value)
 	return data
diff --git a/myredis/myredis.go b/myredis/myredis.go
index e697ef5..6369e85 100644
--- a/myredis/myredis.go
+++ b/myredis/myredis.go
@@ -22,6 +22,7 @@ type RedisDial interface {
 	Do(commandName string, args ...interface{}) (reply interface{}, err error)      // 一次操作
 	TryLock(key interface{}, value interface{}, lifeSpan time.Duration) (err error) //  试着加锁
 	Unlock(key interface{}) (err error)                                             // 解锁
+	Refresh(key interface{}, lifeSpan time.Duration) error                          // 更新时间
 }
 
 // DefaultConf ...
diff --git a/myredis/myredis_test.go b/myredis/myredis_test.go
index a521cdc..deaee4f 100644
--- a/myredis/myredis_test.go
+++ b/myredis/myredis_test.go
@@ -16,7 +16,14 @@ func Test_cache(t *testing.T) {
 
 	fmt.Println(err)
 	aaa := "ccccc"
-	res.Add("aaaa", aaa, 20*time.Second)
+	res.Add("aaaa", aaa, 2*time.Second)
+	res.Refresh("aaaa", -1)
+	for i := 0; i < 10; i++ {
+		aaa = ""
+		err := res.Value("aaaa", &aaa)
+		fmt.Println(err, aaa)
+		time.Sleep(1 * time.Second)
+	}
 	res.Close()
 	res.Add("bbbb", aaa, 0)
 	res.Close()
diff --git a/myredis/pool.go b/myredis/pool.go
index 2f48421..1344076 100644
--- a/myredis/pool.go
+++ b/myredis/pool.go
@@ -175,3 +175,34 @@ func (mc *redisConPool) Do(commandName string, args ...interface{}) (reply inter
 func (mc *redisConPool) Close() (err error) {
 	return nil
 }
+
+// Refresh 更新时间
+func (mc *redisConPool) Refresh(key interface{}, lifeSpan time.Duration) error {
+	expire := "EXPIRE"
+	var args []interface{}
+	args = append(args, mc.getKey(key))
+	if lifeSpan > 0 {
+		if usePrecise(lifeSpan) {
+			expire = "PEXPIRE"
+			args = append(args, formatMs(lifeSpan))
+		} else {
+			expire = "EXPIRE"
+			args = append(args, formatSec(lifeSpan))
+		}
+	} else if lifeSpan == keepTTL {
+		expire = "EXPIRE"
+		args = append(args, 2147483647)
+	}
+
+	con := mc.GetRedisClient()
+	defer con.Close()
+	repy, err := mc.DO(con, expire, args...)
+	if mc.conf.isLog {
+		mylog.Info(redis.String(repy, err))
+	}
+
+	if err != nil {
+		mylog.Error(err)
+	}
+	return err
+}