Abstract: In order to solve the problem of computational efficiency and accuracy of finite element simulation in vehicle rollover research, multi-rigid-body dynamics and finite element simulation of vehicle rolling were carried out respectively based on the test conditions of FMVSS208 platform vehicles in the United States. Considering the kinematic data exchange between the two simulation methods of vehicle movement attitude in the rolling process, a cooperative simulation method of the motion attitude of vehicle rolling was presented. The results show that the method can take the advantage of multi-rigid body dynamics simulation to replace some kinematic calculation process in finite element simulation, improve the efficiency of finite element simulation on the basis of finite element simulation accuracy, and provide a new technology way for the study of vehicle rollover safety.