The utility model discloses a plateau severe cold district tunnel transverse drainage insulating tube that prevents frostbite, including the drain pipe, wherein the drain pipe comprises inner tube and outer tube, and wherein the inner tube is the PPR pipe, and the outer tube is the PVC pipe, is equipped with the heat preservation between inner tube and the outer tube, and the heat preservation is the polyurethane insulation material. This drain pipe presss from both sides between outer tube PVC pipe and inner tube PPR pipe and separates a layer of polyurethane insulation material, because polyurethane insulation material has a fine thermolysis, the effectual elimination ambient temperature of ability is to intraductal influence of temperature, fine plays frostproofing heat retaining effect, has prevented that freeze and the aqueduct is frozen swelling breaks at severe cold environment low tube water -logging, has guaranteed that the tunnel drainage is unobstructed.