As the traditional communication network reliability evaluation system for rail transit cannot balance the hard⁃ware performance,often loses the data produced in the operation of rail transit,and its assessment accuracy is low,the reliabili⁃ty evaluation system for wireless network communication in rail transit is improved. The system consists of sensor module,Zig⁃Bee technology module,gateway module and computer. The sensor module is used to collect operation node data of communica⁃tion network system for rail transit,and send the data to the ZigBee technology module for data processing. The router in ZigBee technology module is used to collect data. The data in the routers is resolved by ZigBee network coordinator. Based on this,the continuous working system is build,and the data in the system is sent to the gateway module. The data processed by ZigBee technology module is converted by the gateway module into the serial data easy to parse according to the level change. The proto⁃col update for the processed data is conducted with the general packet radio service,and then is transmitted to the computer for the reliability evaluation and analysis. The flow chart and key code for assessment of the rail transit wireless network communica⁃tion reliability are designed in the evaluation software. The experimental result shows that the designed reliability evaluation sys⁃tem has high evaluation accuracy.%传统轨道交通通信网络可靠性评估系统无法均衡自身的硬件承载性能，常常丢失轨道交通运行中产生的数据，评估准确度较低。因此，对轨道交通无线网络通信中的可靠性评估系统进行改进设计。该系统由传感器模块、ZigBee技术模块、网关模块和计算机组成，传感器模块用于收集轨道交通通信网络系统运行节点数据，并交由ZigBee技术模块进行数据处理。ZigBee技术模块通过其中的路由器采集数据，通过ZigBee网络协调器解析路由器中的数据，构建持续工作体系，并将体系中的数据传输到网关模块。网关模块依据电平的变化将ZigBee技术模块处理过的数据转变为易于计算机解析的串口数据，将此数据交由通用分组无线业务进行协议更新后，传输到计算机中进行可靠性评估分析。评估软件中设计了对轨道交通无线网络通信可靠性进行评估的流程图和关键代码。结果表明，所设计的可靠性评估系统拥有较高的评估准确度。
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