Abstract: In order to improve the safety awareness of the employees and participants in the railway freight industry and reduce the cost of railway safety exercise, this paper designed and implemented a multi terminal virtual exercise system for railway freight car accidents.The system adopted modular design, which mainly consisted of three parts, including knowledge learning module, accident simulation module and examination system module.The system also adopted multi terminal design mode, providing VR (virtual reality) terminal, desktop terminal, mobile terminal and mobile VR terminal for users to use. Each terminal could complement each other in the aspects of interaction mode, learning convenience, etc., which provided users with a set of exercise system with strong immersion, high participation and good experience.In order to increase the learning efficiency and the use intention of the trainers, the paper proposed a new human-computer interaction scheme to implement the natural walking and large-scale movement of the trainers in the scene by using the leg binding position tracker.This method transformed the in-situ step movement of the characters in the real space into the position movement in the virtual space by using the leg binding position tracker.At the same time, the paper proposed an intelligent pop-up window design of event auto triggering, which achieved the more intelligent guiding learning effect of the trainers in the virtual environment. The implementation of the system can provide a new way for the training of railway freight wagon staff.