Medical disinfectant constant-temperature heater

The utility model relates to a medical disinfectant constant temperature heater, which comprises a base, and a heating pad and an annular heat preservation sleeve seat which are arranged on the base, the annular heat preservation sleeve seat comprises a support inner wall sleeved outside the heating pad, a heat insulation outer wall sleeved outside the support inner wall at intervals, and a top end fixing ring arranged on the inner edge of the top end of the heat insulation outer wall along the circumferential direction, the elastic inner wall is arranged between the lower edge of the top end fixing ring and the upper edge of the supporting inner wall; the supporting inner wall, the elastic inner wall, the top end fixing ring and the heat insulation outer wall define an annular heat preservation cavity internally provided with a heat conduction medium, and the annular heat preservation cavity is further communicated with the pressure increasing and reducing device. Compared with the prior art, the disinfectio