With the development and extension of electric vehicle in our country, research on electric vehicle technology becomes a hot topic in recent years. This paper starts with the technical barriers from electric vehicle endurance ability and described the improving methods of electric automobile thoroughly, pointed out the existing problems in the process of application about the methods in this paper. Then put forward the application of solar energy, wind energy technology in electric cars, proposed a research direction for the development of electric vehicle. At last, the paper proposed a research direction for the development of electric vehicle.