This article refers to the method of scholar Wang Jibo, manufacturing is one of the powerful driving force to promote Ningbo's economic development, and the automobile industry as a manufacturing sub-sector also plays a role in promoting Ningbo's economy. Therefore, how to scientifically develop the Ningbo automobile industry is particularly important. Based on the GEM model, this paper constructs the evaluation index system of Ningbo automobile industry cluster competitiveness, and uses the coefficient of variation method to determine the weights of various indicators, so as to obtain the competitiveness of its automobile and the comparative analysis of Shanghai, Chongqing and Guangzhou automobile industry, and finally the empirical results. Give comments and suggestions.