The invention relates to the technical field of tunnel drain pipe ice crushing equipment, and discloses a tunnel drain pipe deicing internet monitoring device for reducing the melting point based on pressure. The device comprises a pipeline, a rotating disc comprises a one-way ring, spiral threads, a first spring and a pawl, a shell comprises an air inlet groove, a heating groove, an arc groove and a sliding groove, ratchet teeth are arranged in a rotating shaft, the lower portion of an air bag is provided with an elastic opening, and an ice pressing table comprises an ventilation groove and athrough hole. The ice pressing table moves to the lower portion of the pipeline and squeezes and breaks ice, because forces act on each other, the ice pressing table pushes a second spring to move upwards and squeezes the air bag, hot air of the air bag is squeezed by the elastic opening to be ejected out from the through hole, and by means of the structure, high pressure and heat are used for impact, so that the problems that an existing tunnel drain pipe deicing device cannot melt and discharge broken ice blocks, the ice blocks are caked and accumulated again, and broken ice cannot be rapidly molten are solved.