Cascade elevator tread polishing device

The invention discloses a cascade elevator tread polishing device. The device comprises a polishing chassis; rails are respectively arranged on the left and right sides of the polishing chassis; a cylinder is arranged in middle of the polishing chassis; a slide support plate is arranged at one end of the cylinder, and moves on the rails; side support plates are symmetrically arranged on the slide support plate; a first support column and a second support column are respectively arranged on each side support plate; a polishing box body is arranged above the rails; a pressing plate driven by a cylinder to move up and down is arranged under the polishing box body; a wool felt layer is arranged under the pressing plate; a graphite cloth layer is arranged under the wool felt layer; and an abrasive belt layer is arranged under the graphite cloth layer. The device is simple in structure, reasonable and novel in design and convenient in operation, adopts mechanical polishing to improve the working efficiency, and ado