Abstract: Turnout is the key structure for train switch. As the weak link of rail transit line, scientific detection of turnout structure during service is an important guarantee to maintain the safe operation of rail transit. Adopting "BIM + VR" technology, this paper proposes a course of the turnout detection technology experiment combining virtual and real was set up, which effectively solves the problems of the singleness of theory teaching and the limitation of operation space and time of field practice and also has greatly stimulated students' enthusiasm of study. The course organically combined theoretical learning, virtual detection and on-site training to cultivate students' learning ability of theoretical knowledge and operation level of practical skills in a three-dimensional way, which is helpful to guide students to improve their innovative thinking and engineering awareness and contribute to the cultivation of innovative talents in track engineering.