In order to solve the bottleneck problem of the shortage of professional and high-quality railway talents in China, the team proposed to create a "mixed reality rail transit training system" solution. Hololens is the latest generation of mixed reality head-mounted equipment of Microsoft. Through wearing Hololens, the digital twin simulation scene created by unity development tool can be integrated with the physical environment in the form of holographic images. Through the reconstruction and integration of multi-source information, the three-dimensional dynamic scene and entity behavior can be simulated and reproduced in the computer, so that users can interactively realize arbitrary operations in the scene and get the most real feedback of the scene, create a new way of virtual interaction. Based on the Hololens mixed reality rail transit training system, the kinect depth camera and infrared sensor are used to capture the user's high-precision motion, so that the user can carry out multi-angle simulation operation of large railway complex equipment in a natural interactive way.