Abstract: Based on the technology of virtual reality，which was applied in the field of Urban Transit training，the article studied on the fault training platform of three-dimensional virtual train from the train equipment modeling，train equipment status monitoring and the fault phenomenon simulation. The design of three-dimensional virtual train model was based on 3ds MAX. Unity3D was taken as a platform，VC# 2010 was used as a compiler to drive and control 3D models, implement the human-machine interaction.