diff --git a/cachex.go b/cachex.go
index 60af6ed..16f85b3 100644
--- a/cachex.go
+++ b/cachex.go
@@ -12,8 +12,7 @@ import (
 // 到设定的点就删除
 
 type cache struct {
-	prefix string
-	store  sync.Map
+	store sync.Map
 }
 
 type cacheData struct {
@@ -24,11 +23,9 @@ type cacheData struct {
 
 var ErrorEmpty error = errors.New("empty cache")
 
-func NewCache(prefix string) *cache {
+func NewCache() *cache {
 
-	c := &cache{
-		prefix: prefix,
-	}
+	c := &cache{}
 
 	go func() {
 		for {
@@ -51,13 +48,11 @@ func (c *cache) Set(key string, value interface{}, expire time.Duration) {
 		expire = time.Hour * 24 * 365
 	}
 	cd := &cacheData{key, value, time.Now().Add(expire)}
-	key = c.prefix + key
 	c.store.Store(key, cd)
 }
 
 // 读取缓存
 func (c *cache) Get(key string) (interface{}, error) {
-	key = c.prefix + key
 	if v, ok := c.store.Load(key); ok {
 
 		cc := v.(*cacheData)
@@ -72,17 +67,13 @@ func (c *cache) Get(key string) (interface{}, error) {
 
 // 删除缓存
 func (c *cache) Delete(key string) {
-	key = c.prefix + key
 	c.store.Delete(key)
 }
 
 // 清空缓存
 func (c *cache) Clear() {
 	c.store.Range(func(key, value interface{}) bool {
-		// 根据前缀删除
-		if key.(string)[:len(c.prefix)] == c.prefix {
-			c.store.Delete(key)
-		}
+		c.store.Delete(key)
 		return true
 	})
 }
diff --git a/cachex_test.go b/cachex_test.go
index 054b402..3dd321c 100644
--- a/cachex_test.go
+++ b/cachex_test.go
@@ -9,7 +9,7 @@ import (
 )
 
 func TestCache(t *testing.T) {
-	c := cachex.NewCache("")
+	c := cachex.NewCache()
 
 	c.Set("test", "test", time.Second*5)