Prefabricated stair hoisting device

The utility model relates to the field of stair hoisting devices, and discloses a prefabricated stair hoisting device which comprises a main body, rotating cavities are formed in the two sides of the main body, placing plates are fixedly connected to the lower portions of the outer walls of the two sides of the main body, and control boxes are fixedly connected to the lower surfaces of the placing plates. And the upper surfaces of the placing plates are fixedly connected with protective shells, the upper surfaces of the placing plates are fixedly connected with servo motors, the output ends of the servo motors penetrate through the outer wall of the main body to the interior of the rotating cavity and are fixedly connected with threaded rods, and rod bodies of the threaded rods are sleeved with threaded blocks. According to the prefabricated stair fixing device, the positions of the electric telescopic rods on the stabilizing plates can be adjusted by moving the sliding blocks on the threaded blocks, and then