Heat preservation box capable of adjusting heat preservation space

The utility model discloses a heat preservation box capable of adjusting heat preservation space, which comprises a box body, a partition plate is fixedly connected to the inner side wall of the box body, a threaded rod is rotatably connected between the partition plate and the inner wall of the box body, a pair of sliding blocks is in threaded connection with the outer wall of the threaded rod, moving plates are arranged on the two sides of the threaded rod, and the moving plates are slidably connected to the side walls of the box body and the partition plate. A pair of supporting rods are connected between the movable plates and the sliding blocks in a hinged mode, sliding plates are arranged between the movable plates and the inner wall of the box body, sliding grooves are formed in the side walls of the sliding plates, and telescopic plates are connected into the sliding grooves in a sliding mode. And thus, the sliding blocks push the supporting rods to slide towards the middle, the movable plates slide t