简述了列车交会动态压力波实车实验测试系统的组成和基本原理。系统以压阻式压力传感器、数据采集仪和微机为核心，应用超声、红外检测技术，实现了列车交会压力波、交会车辆侧壁间距及相对车速的同时测量，并成功应用于广深线实车实验中。文中还探讨了实车实验中存在的其它问题和解决方法 The composition and basic principle of dynamic pressure wave actual test system of train intersection are briefly described. The system uses piezoresistive pressure sensor, data acquisition instrument and microcomputer as the core, the application of ultrasonic, infrared detection technology, to achieve the train rendezvous pressure wave, rendezvous vehicle sidewall spacing and relative speed of the simultaneous measurement, and successfully applied to the Guangzhou-Shenzhen-Shida Car experiment. The paper also discusses other problems and solutions in the real car experiment