Complete box type reduction box cold dismantling device

The invention relates to a cold disassembling tool of a reduction gear box of an oil pumping unit, which is mainly applied to disassembling a complete box type reduction gear box of a belt pumping unit. A top plate, a soleplate and a sliding vertical plate are connected with a fixing vertical plate; the sliding vertical plate moves left and right by taking the top plate and the soleplate as an upper guide track and a lower guide track. The top plate and the soleplate are respectively provided with a row of square openings in which square baffle plates are arranged, and the sliding vertical plate can stay in a position required. When a gear and an axis are disassembled, a shell body of the reduction gear box and the gear and the axis to be disassembled are well fixed; a hydraulic device is started, and the disassembly of the gear and the axis of the reduction gear box can be conveniently realized. The cold disassembling tool improves the disassembling efficiency of the reduction gear box, saves electricity con