Taking the automobile industry as an example，this paper analyzes the impact on the Multinational Companies 'profitabilityoftheenvironmentalresponsibilityfromtherespectiveof empirical research. The results show that the performance of environmental responsibility signifi cantly impact profi t margins of that companies. The direction of ef ects may be positive or reverse，the time span may be at sight or lag one or two phases，the extent varies among dif erent companies. This is a common phenomenon to multinational companies in many industries，because the environmental responsibility is technical，costly，and the strategy is globalized.