With the complete withdrawal of subsidies in 2023, China's new energy vehicle application and promotion policy will shift from financial support to encouraging technological innovation. On the basis of summarizing the development status of Chinese new energy vehicle industry, the subsidies and technological innovation policies related to new energy vehicle in recent years was reviewed, and then the invention patent and technological innovation of Chinese new energy vehicle from various aspects was analyzed using incoPat patent database. It is found that Chinese new energy vehicle industry maintains rapid development, and there is a certain degree of industrial concentration in leading enterprises and developed areas. Technology innovation is paid more attention in new energy vehicle industrial policies, the number of patent applications steadily increases, and technological innovation has a significant role in promoting market development. However, there are also some problems with technological innovation in new energy vehicle industry, such as short patent duration, low market value, and the failure of regions or applicants in balancing the quality and quantity of patents. In this regard, some suggestions are put forward, such as the national refinement of technological innovation reward system, local policies in accordance with local conditions, and leading enterprises' demonstration and guidance.