In this paper, we build an electric vehicle's time-series model of patent technology based on the analysis patent data, conducting to the status and trends of electric vehicle's patent applications; based on the patent applications in the related fields, time and the applicant and the International Patent Classification corresponding analysis, we research and predict the priority areas of electric vehicles' patent technology. In addition, we summarize the major routes of patent technology of some automotive manufacturers for the China's enterprises positioning in international competitiveness in the electric vehicle industry. Then they can use these as references to develop their own proprietary routes and adjust the direction of investment in patent technology.