The invention aims at providing a polisher. The polisher comprises a box body, a feeding inlet, air supply outlets, a twisted dragon, a discharging channel and a hanging rack groove. The feeding inlet is located at the top of the box body. The air supply outlets are located in any side walls inside the box body. The discharging channel is arranged at the bottom of the box body, and the twisted dragon is arranged in the discharging channel. The hanging rack groove is a long-strip-shaped opening and formed in the middle of the hanging wall of the box body, and the opening of the hanging rack groove is located at the edge of the hanging wall of the box body. According to the polisher, the structure is simple, each part of a workpiece are polished through the movement of steel grit driven by wind power in the sealed box body, and workpieces of complex shapes can be polished, so that the polishing processes are greatly simplified, the labor cost is reduced, and the polishing efficiency is improved.