diff --git a/resource/redisCli/util.go b/resource/redisCli/util.go
index b6b4f8092bf14194d556af63dcb375ab70ca7ae8..5c6fd4c2c135569d89e84dbde632c7bbd0293150 100644
--- a/resource/redisCli/util.go
+++ b/resource/redisCli/util.go
@@ -74,3 +74,26 @@ func DelCache(key string) error {
 	}
 	return nil
 }
+
+func DecrBy(key string, num int64) (int64, error) {
+	resNum, err := RedisClient.DecrBy(context.Background(), key, num).Result()
+	if err != nil {
+		return 0, err
+	}
+	return resNum, nil
+}
+
+func DecrNumExpire(key string, num int64, expiration time.Duration) (int64, error) {
+	times, err := DecrBy(key, num)
+	if err != nil {
+		return 0, err
+	}
+	ttl, err := RedisClient.TTL(context.Background(), key).Result()
+	if err != nil {
+		return 0, err
+	}
+	if ttl == -1 {
+		RedisClient.Expire(context.Background(), key, expiration)
+	}
+	return times, nil
+}