The withstanding force of the electric vehicle is different from that of the traditional one, due to the influence of complex lateral force, so the traditional automobile body structure is not suitable for four electricdrive car. According to the loading characteristics of fourwheeldrive electric vehicles, this paper proposed a kind of vertical loading lateral not loading type Unibody structure, and the body dynamics simulation was analyzed by the ADAMS software. Simulation and commissioning research shows that the body structure can effectively withstand fourwheel independent drive electric vehicles in the driving conditions suffered internal force of lateral, and improve the vehicle’s stability, security and comfort.