Research on Adhoc network routing is mainly to find a connected routing from the source to destination points. It often ignores the network QoS demand. If the data traffic exceed the network to be able to withstand the maximum, ad-hoc networks will not guarantee the flow of data transmission quality. Therefore, this paper proposes a improved QoS- AOMDV routing protocol in AOMDV routing. It adds certain restriction condition that consists of bandwidth, delay, hops and priority, which make routing node must meet QoS quirements when the phase of routing initation and routing maintenance. The simulation results show that the multi-path routing protocol can guarantee the quality of service of communication.