Thermal insulation door plate of freezer

The utility model relates to the technical field of heat preservation door plates, and discloses a heat preservation door plate of a freezer, which comprises a first glass door, a second glass door and a heat preservation cover plate, sliding rails are arranged at two ends of the first glass door, the sliding rails are connected with the first glass door in a sliding mode, and the sliding rails are located on the lower side of the first glass door and connected with the second glass door in a sliding mode. Through holes are formed in the first glass door and the second glass door, sliding grooves are formed in the side walls of the through holes and slidably connected with a small door, baffles are fixedly connected to the positions, located on the lower side of the small door, of the first glass door and the second glass door, the baffles and the small door are provided with first sealing strips matched with each other, and a heat preservation cover plate is arranged at one end of a sliding rail. According t