Three dimensional data reconstruction technology and simulation software simulation technology based on MBD are used to build the bottom platform, and the top control software is used for data transmission. According to the use requirements, indexes and size boundaries of different vehicle models, the 3D models of vehicle components are quickly called or created or optimized, and the simulation analysis and data comparison of corresponding parameters are carried out. Through the mutual transfer of simulation data of vehicle components, the modeling and design indexes of power system are in a strict data calculation environment, To achieve the system level, solve and verify the vehicle power system and vehicle system is the optimal matching problem.