Abstract: The production and construction of coal mines strongly promote local economic development and social progress, and at the same time, it also causes a certain degree of damage and impact on the local geological environment and land resources. In order to solve the contradiction between the coordinated development of mineral resources development and ecological environment protection, and effectively control the subsidence area to avoid and reduce the damage to the ecological environment of the mining areas, this paper takes the reclamation area of Xuchang coal mine as the object, based on the analysis of the physical property and the demand of gangue, the feasibility of using gangue to refill and reclaim the subsidence area was evaluated, and the gangue is also applied in the subsidence area of farmland and water-accumulating area. Good social and economic benefit has been obtained.