Abstract: The paper takes 41 prefecture-level cities in the midwest urban agglomeration as the research samples to construct the evaluation index system of coupled system capacity and ecological environment, and adopts variation coefficient method, comprehensive development level evaluation model and coupling coordination model to empirically analyze industrial undertaking ability and coupling coordination of ecological environment and its evolution characteristics in 2009-2013. The results show that the industrial undertaking capacity of city group and ecological environment coordination degree is generally low, appearing mild disorders, moderate disorders and serious disorders; the overall undertaking coupling ability of industrial city group and ecological environment coordination degree show steady temporal variation characteristic in the study period with the development of the city, but there is obvious time difference between different industrial undertaking capacity and ecological environment coordination degree,and there exists the spatial distribution pattern of “middle high and west low” between industrial undertaking ability of city group and ecological environment coupling degree.

Key words: industrial undertaking capacity, ecological environment, coupling coordination, midwest urban agglomeration