With the features of easy networking and node canbe mobile independently,AODV network is a wireless,equited and self-or-ganizing network. The wireless network features and dynamic change of network topology in mobile Ad Hoc makes the causes of network faults more diverse,also makes it more difficult for the network to ensure the quality of service. Aiming at the problem of network chain breaking,based on the routing repairing algorithm of AODV protocol to study,put forward a kind of routing repairing scheme that initi-ates to link request with hop-by-hop to the two downstream nodes at the breakpoint. Simulation results show that the improved algorithm can effectively reduce the average end-to-end delay,improve the packet delivery ratio,so as to achieve a more stable networking quality of service.%移动Ad Hoc网络作为一种无线对等自组织网络，具有组网容易、节点可自主移动等特点。无线网络本身的特点以及移动Ad Hoc网络中网络拓扑的动态变化特性使得引起网络故障的原因更加多样，使得保证网络服务质量更加困难。文中针对网络断链问题，基于AODV协议路径修复算法进行研究，提出一种在断点处向下游二跳节点逐跳发起链接请求的路径修复方案。仿真结果表明，改进后的算法能有效减少端到端的平均时延，提高分组投递率，从而达到较稳定的网络服务质量。
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