Abstract: This paper introduces the problems faced by the heat source reconstruction of kouzidong mine, analyzes its engineering status, and gives its actual cold and heat load demand through calculation.Combined with the actual demand of mine, this paper puts forward the integrated utilization system of cold and heat using the return air of mine, and analyzes the feasibility of the integrated system in detail.The scheme arrangement of the system is described, the principle and process of the system are introduced, and the design flow and system composition of the cold and hot integrated system are given.Finally, the beneficial effect of the system is analyzed.