Abstract: In order to realize the deep well cooling technology of coal mine, the feasibility analysis was carried out on the vaporization and cooling of mixed liquid liquid roadway in Zhaolou coal mine. According to the cooling capacity of the mine, the demand for the liquid oxygen and liquid nitrogen mixed liquid required for the mine is calculated, and the gas produced and the equipment needed are analyzed. The feasibility of vaporization and cooling of liquid oxygen liquid nitrogen mixed liquid roadway is preliminarily explained.