Abstract: In response to the requirements of national energy conservation and environmental protection, the establishment of green energy heating mine, it is proposed to eliminate the existing coal-fired boiler in 2^# air shaft of Xiaobaodang Coal Mine and use the waste heat resources of the mine to solve the thermal insulation and anti-freezing of the wellhead of the air wellsite and the heat demand for building heating. Based on existing four technical routes of exhaust air waste heat utilization, through the comparative analysis of their technical characteristics, we finally proposed adopting direct cooling deep enthalpy exhaust air heat pump technology to solve the coal mine in hot demand, and introduced 2# well site general situation of Xiaobaodang Mine, wind heating demand and direct cooling deep enthalpy exhaust air heat pump system of technical route. Finally, we carried out the economic analysis, and completely solved the environmental protection problems caused by coal burning after the implementation of the project, and the existing waste heat of coal mine is recycled to reduce the waste of energy.