Abstract: The aim of the CAFC-NEV mandate for new energy vehicles is to build a long-term mechanism to causing?Innovation. We gathered the data of 16 new energy automobile (vehicle) manufacturers.?And then, we studies and analyses the New changes of R&D Investment of New Energy Vehicle Manufacturers under the Background of the CAFC-NEV mandate from gestation to implementation through?three dimensions: scale, intensity and structure.?The results showed?that the CAFC-NEV mandate has played a positive role in "early release" of new energy vehicle enterprises，which significantly increased innovation?input?of automobile manufacturers.?and the scale is more obvious than that of intensity.?It seems pay more attention to capital investment, less to?human resources.?Heterogeneity of manufacturers has a moderating effect on the implementation effect of the CAFC-NEV mandate. The policy incentive on?"passenger car" manufacturers is relatively more significant. Scale and Roe have a positive moderating effect on the policy incentives.?The optimization and adjustment of China's new energy automobile industry policy should attach great importance to the positive role of policy "gestation period" in guiding relevant production enterprises to lay out "initiative" in advance. The CAFC-NEV mandate should focus on promoting manufacturers to increase the intensity of R&D investment and optimizing the structure of R&D investment, accelerate building?a new energy automobile industry environment?with more equitable, and guide manufacturers with different enterprise characteristics to embark on the development path driven by independent innovation.