Abstract: Based on data of 13 major grain producing areas in China, the paper measures the effects of strength of environmental regulation on the total factor productivity with two step DEA method to reveal the space-time differences of agricultural environmental efficiency in grain producing areas. The results show the intensity of environmental regulation has a direct impact on the total factor productivity of major grain producing areas and the space-time differences in different provinces are relatively large; environmental regulation will reduce the total factor productivity of China′s major grain producing areas: from a static perspective, the more strict environmental regulation, the more the total factor productivity decline;from the dynamic point of view,it can improve the efficiency of agricultural total factor productivity.

Key words: environmental regulation, major grain producing areas;total factor productivity