diff --git a/cache/cache.go b/cache/cache.go
index f07e545..97da17f 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -22,10 +22,16 @@ func NewSliceCache[T any](fun func() ([]T, error), duration time.Duration) *Slic
 	}
 }
 
+func (c *SliceCache[T]) FlushCache() {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+	c.data = nil
+}
+
 func (c *SliceCache[T]) GetCache() []T {
 	l := len(c.data)
 	expired := time.Duration(c.setTime.Unix())+c.expireTime/time.Second < time.Duration(time.Now().Unix())
-	if l > 0 && expired || l < 1 {
+	if l < 1 || (l > 0 && c.expireTime > 0 && expired) {
 		r, err := c.setCacheFunc()
 		if err != nil {
 			log.Printf("set cache err[%s]", err)