Active Queue Management is an active research area.Its main objective is to provide low delay and low loss service in packet-switched network.RQ is a new random early detection algorithm.It can divide the seriousness of congestion into six levels according to the aggregate packet arrival rate and the average queue length in the router.Each level has appropriate packet drop probability.The responsiveness and stability properties of RQ are superior to RED in favor of promptly reacting of rate-based dropping than queue-based.TCP and RQ are modeled as a closed loop feedback control system and the stability is analyzed.The performance of RQ was compared with RED by simulations.The results show that RQ can keep low queuing delay and low packet loss in wide variable load conditions.