The communication network in Manned Launch Vehicle was developed for long-range tes-ting , launch and control of launch vehicle , in which hot-standby route and retransmission validation protocol were used to build the information interchange platform with high efficiency and high relia -bility.On the basis of the system frame design and reliability analysis , applying key technology of the fault diagnosis in waiting-for-lift-off phase and the rocket launch process command , a highly reli-able communication network system was implemented .The system was successfully applied to the manned space program .The technology was successfully applied to the optimization of the rocket ’ s information transmission and application mode .A standard system framework was provided .It can be applied to the system design of future rocket and spacecraft information transmission and applica-tion.%载人火箭信息传输网络系统是为适应载人运载火箭远距离测试和发射控制而研制，系统采用热备份路由及重传验证信息传输方法，实现了高效、高可靠的地面信息交换平台。在系统框架设计及可靠性分析的基础上，对待发段故障诊断、流程指挥与射前监测等关键技术研究，实现了高可靠信息传输网络系统，系统已圆满完成载人航天工程任务。本技术成功应用优化了运载火箭信息传输与应用模式，提供了标准体系构架，对于后续运载火箭及航天器信息传输与应用的研制具有重要借鉴意义。
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