Abstract: In order to understand the compatibility characteristics of collision between tram and car, and further provide ideas and basis for the safety of vehicle occupants, improve the collision compatibility, the finite element method is used to simulate 10 common collision conditions of tram and car. The research results show that trams are very aggressive to cars, serious incompatibility exists between them. Therefore, the key of improving the collision compatibility is to solve the collision stiffness matching between tram and car. When the collision speed is greater than 30 km/h, the car occupants are bound to be in danger, so the tram should reduce the running speed properly at the grade crossing.