Rack of polisher

The invention discloses a rack of a polisher. The rack comprises a base, a stand column and a cross beam. A lead screw is arranged in the stand column, and the top end of the lead screw is connected with the output end of a speed-change motor. The cross beam is fixed to a hanging plate through rolling wheels and can move left and right along the hanging plate, and the hanging plate is connected with the lead screw through columns with internal threads. Contact inductors are arranged on the upper portions and the lower portions of the stand columns and limit the cross beam. The contact inductors are connected with the speed-change motor. The two columns with the internal threads are distributed at the upper end and the lower end of the hanging plate. The rack has the beneficial effects of being simple in structure, convenient to use, stable in running and low in production cost.