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To solve the problem between the high QoS requirement and bandwidth impartiality when the real-time traffic transmitted in IP network,load-adaptive slotted priority queue（LASPQ） was introduced. According to the load of the real-time traffic,it was transferred with an appropriate triggering period τ. LASPQ keep real-time traffic’s delay,jitter in need,while improving the transferring efficiency of non-real-time traffic. It is proven from theory and simulation that LASPQ is better than traditional queue schemes such as PQ,WFQ,when transmitting real-time traffic.