The utility model provides mine gas drainage equipment. A hole packer is connected with one end of a high-pressure air storage tank through a high pressure resistant pipe, the other end of the high-pressure air storage tank is connected with an air compressor, a first electronic-control valve is arranged on the high pressure resistant pipe between the hole packer and the high-pressure air storage tank, the high pressure resistant pipe between the first electronic-control valve and the hole packer is connected with an air-water separating box through an air-water pumping pipe, a second electronic-control valve is arranged on the air-water pumping pipe, one or more air gathering ports are arranged at the top of the air-water separating box, and a drain outlet and a water outlet are arranged at the bottoms of the two sides of the air-water separating box. According to the mine gas drainage equipment, by the arrangement of the high-pressure air storage tank, the breathability of coal bed can be increased effectively, the mine gas can be released as soon as possible; by the arrangement of the air-water separating box, water gathered in a coal mine can be drained together with the mine gas in the drainage process of the gas, the mine gas can be separated from the water, and the drainage effect of the coal mine is improved.