Because of the strong correlativity between automobile and correlative industry, the automobile industry can drive development of more than 150 industrial departments up and down the industrial chain, and displays a national comprehensive power in science and technology. Therefore, its healthy development relates to virtuous cycle of national economy. The article sets up relative mathematical model based on basic principle of Input-Output Analysis and quantitatively analyzes the driving effectiveness of the automobile industry to its relative industries in order to propose references for the development and enhancement of national automobile industry.