The utility model belongs to the field of spent fuel related assembly switching gripping apparatuses necessary for a spent fuel pool in a nuclear power plant, and particularly relates to a winding device suitable for a spent fuel related assembly switching gripping apparatus. The device comprises a bottom plate, a motor, a speed reducer, a reduction box, a coupler, a winding drum, winding drum supporting bases and a reduction box supporting base. The motor is connected with one end of the speed reducer, a gear transmission mechanism is installed in the reduction box, the other end of the speed reducer is connected with one end of the gear transmission mechanism, the reduction box is fixedly installed on the bottom plate through the reduction box supporting base, the other end of the gear transmission mechanism is connected with the winding drum through the coupler, and the winding drum is fixedly installed on the bottom plate through the two winding drum supporting bases. The winding device is compact in overall structural layout, will not intervene with the on-site use environment, and is high in reliability, flexible in transmission and accurate in control; the structural material is stainless steel, and the corrosion of the structural material is avoided; a steel wire rope in a loaded state can be wound around the winding drum.