It is no doubt that the eco-footprint model can be used to mark the global sustainable development and regional development, but not for regional sustainable development. This paper, aiming at this limit, presents an improved eco-footprint model which has been applied to analyze the relationship among productive eco-footprint, consumptive eco-footprint and ecological capacity in Ji'ning, a typical coal-crop composite production area. The results indicate that Ji'ning's regional unsustainable development is chiefly derived from the over-output eco-footprint, besides the regional self consumption. Mineral products and agricultural products shall take the responsibility to recover the regional environment in Ji'ning.