在分析IP网自身协议不足的基础上，提出r对网络服务质量（QoS）进行优化的必要性。分析了遗传算法，发现遗传算法是一种基于反复改进策略的搜索方法，可以求解很多领域的各种组合搜索和优化问题，对网络服务质量进行优化尤为适用。基于遗传算法提出一种对IP路由进行优化的方案，以此提升网络QoS的综合指标。通过仿真验证了方案的可行性，仿真结果显示所提出的算法对解决IP网络拥塞、改善吞吐量方面有明显效果。“,”In view of the insufficiency of protocol of IP network,it＇s necessary to optimize QoS of network. Genetic algorithm is studied,which is a search method based on repeated improvement strategies. It can solve kinds of problems about search and optimiza- tion in many areas, lt＇s especially useful for optimizing QoS of network. And then a formula of optimization of IP routing with genetic al- gorithm is put forward. The formula improves the composite indicator of QoS of network. Finally,simulation verifies the feasibility of the formula. The simulation result shows that it is quite useful for solving IP network congestion and improving network throughput.