This project develops a rail transit mobile experimental APP consisting of three parts: user's mobile phone page display interactive application, App application and background management application. It mainly realizes two major functions for new railway employees. First, AR technology is used to display the real scene of railway lines in the form of constructing virtual space mapping to reality, which is convenient for new practitioners to quickly understand the actual situation of various railway sections. Then, the principle of railway switch machine is introduced through teaching modules, let employees learn equipment on the mobile phone, and explain the fault solution through fault simulation display and operation video, so that employees can train themselves anytime and anywhere, thus solving the problems of training efficiency and cost for new railway employees. The rail transit mobile experimental APP is mainly provided to major rail transit colleges and universities and major railway bureaus. Through the online resource integration in the form of "Internet rail transit", it provides information resources for the teaching of students in major universities and the training of employees of major railway bureaus. Through the form of "virtual simulation rail transit", it provides an operation platform for the practical training of personnel in major universities and major railway bureaus. (1) the use of AR technology, so that users can have an immersive feeling: The user can take the perspective in the scene as his own perspective, and the eyes of the characters in the scene are the eyes of the user. While controlling the rotation of the character's perspective, the perspective of the scene should also change, so as to realize the purpose of scene inspection by moving the character to change the perspective. The key to realize this function is to change the perspective in the scene through the change of the character's perspective. (2) the use of virtual simulation technology to make equipment teaching more flexible: The teaching APP uses virtual simulation technology to simulate the operation of rail transit equipment, which can not only change the single-mode phenomenon of traditional writing teaching, but also help students to better grasp the boring and obscure professional problems. (3) This APP enables beginners to train themselves anytime and anywhere: This APP realizes that users can learn virtual railway signal equipment at any place and at any time, and users can also carry out simulation learning and fault detection without going to the scene, thus realizing the real integration of safety, authenticity and interest. (4) This product is a "virtual simulation VR" teaching method through APP, so greatly reducing the unit training cost is an inevitable attribute of the product.