Abstract: To solve the problem of lack adequate protection mechanism for high priority data flows, in 802.11 media access process, a multiple reserving media access control (MAC) protocol with congestion control is proposed. In access process, the protocol uses multiple reserving mechanism to protect successful access probability of high priority flows. And the forwarding nodes rejects low priority flows' access request with probability through admission control, in order to avoid congestion in them. The simulation result shows that the protocol proposed in the paper can effectively protects end-to-end throughput, delay and reduce drop ration of high priority flows.