This paper introduced the Ad Hoc network and AODV routing protocol and proposed an optimization method based on studying its inadequacies. This method compared the average speed of the routing nodes and selected the minimum average speed routing as an alternate routing When the primary route fails, start the alternative route. The average delay, drop ratio and network throughput were compared by simulating new routing protocol and the AODV routing protocol through NS-2. Results indicated that the optimized protocol decreased the expense of network and showed better performance than AODV routing protocol.%简要介绍了移动AdHoc网络和AODV路由协议，并在对AODV路由协议进行了研究的基础上针对AODV路由协议的不足之处提出了一种优化方法。此方法比较了路由节点的平均速度，选取平均速度小的路由为备用路由。当主路由失效后，就启动备用路由。通过NS-2对改进的路由协议与AODV路由协议的仿真模拟，比较了平均端到端时延、丢包率、网络吞吐量这三个参数，验证了修改后的路由协议减少了网络开销，能更好的提高网络的性能。
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