Abstract: New energy vehicle industrial policies play an important role in promoting the early stages of industrial development. For the high-quality development of the industry, the future work should focus on policy coordination. Sorting out from the policies of the past ten years, the existing shortcomings on policy appear gradually, such as the policy intentions of policy subject bias policy objectives and imbalances of policy tool matching, etc. These problems make some industry areas lack of guidance and norms in practice. At present, most researches focus on the analysis of the coordination of each policy making subject and the qualitative analysis of policy synergy between central and local government. However, few studies focus on the quantitative analysis and optimization direction in policy tools using. Referring to the conclusions of process theorists in the research on policy coordination, "new energy vehicle industry policy coordination" is defined as the coordination of policy makers and different policy measures to achieve or support the development of the industry.
The fuzzy mathematical method is used to measure the coordination degree from 2009 to 2018 to describe the synergy trend. 263 new energy vehicle industrial policies are sorted out which issued by the governments (four districts such as Beijing) from 2009 to 2018, and divided industrial policies into five categories:fiscal and tax support, industry regulation, planning guidance, supervision and other measures. Furthermore, the industry value chain is decomposed into five links:research and development, production, purchase, use and recycle. Therefore, the coupling coordination model is used to measure the coordination degree in each policy action link from 2015 to 2018.The main research shows that the policy coordination trend of "Central-Shanghai" and "Central-Jiangsu" policies is basically the same and the differences are mainly reflected in R&D, production and recycling links. Improving the policy effectiveness of "policy guidance" and "guarantee measures" will help to improve the coordination level of the central government policy through sensitivity analysis.The results can provide guiding suggestions for the government in optimizing promotion ways of central policies and enhancing regulatory safeguards policy measures. The guiding suggestions for new energy vehicles industry are beneficial to crack the uncoordinated dilemma.

Key words: new energy vehicles, policy field, industrial policies, policy synergy of central and local government