Lifting machine for building

The lifting machine for the building comprises a bottom plate, side plates are fixedly connected to the two sides of the bottom plate, an upper top plate is fixedly connected between the upper ends of the side plates, and first sliding plates are slidably connected to the two ends, located between the side plates, of the bottom plate; and first telescopic rods are slidably connected to the positions, in the direction of one side of the side plate, of the first sliding plates through rotating shafts correspondingly, and second sliding plates are rotationally connected to the upper ends of the first telescopic rods through rotating shafts correspondingly. According to the device, the gear is rotated, and the upper portion and the lower portion of the gear are meshed with the first rack and the second rack respectively, so that the sliding rods on the two sides can move horizontally, objects are placed on the inner side of the containing box, then the containing box can be lifted through movement of the sliding