Abstract: In view of the characteristics of large air leakage and spontaneous combustion of coal seam in the goaf of Y-type ventilation working face, this paper analyzes the application effect of comprehensive fire-fighting technologies such as location determination method of high-temperature area, injection of liquid carbon dioxide, long borehole injection of high molecular materials, etc., based on the engineering background of the treatment of high-temperature points in the goaf of 50105 working face in fale coal mine, forming the inert injection of concentrated pressure Gas control fire, speed up the working face, precise injection of polymer materials to reduce the temperature of high-temperature area and other comprehensive treatment plan, eliminate the high-temperature hidden danger, ensure the safe mining of the working face, and provide experience reference for the fire prevention and extinguishing work of similar working faces