Abstract: The wireless monitoring system for urban rail transit train stability is a transportable compact train stability testing equipment, it can monitor the train stability and comfort in real time. The signal acquisition, analysis and transmission modules of which are designed with integrated structure, in order to reduce the overall volume of the system. Wireless communication technology is adopted to avoid the intricate cable arrangement during conventional measurement process, and simplify the installation procedure on site. In this paper, the design scheme and work flow of the system are introduced. In the real vehicle test and verification, the train stability indexes measured by the designed system and the existing wired equipment are compared and analyzed. The results show that the test equipment of the train stability wireless monitoring system is steady and reliable with convenient installation, accurate measurement and good exhibition of train stability.