A solar car is an electric vehicle powered by solar energy obtained from solar panels on the car.   According to the match standard of American solar car and the general principle and method of automobile design, the steering and suspension and braking systems have been designed. The 3D model of chassis of solar car was built up by using the UG, which is the large-scale CAD/CAE/CAM engineering software.   Solar car is important to solve the energy crisis and environment pollution,so it's paid more attention by the people in the world.