Guide rail polishing device

The utility model discloses a guide rail polishing device which comprises a machine table, a fixed strip, a movable strip, a supporting idler wheel, a limiting idler wheel, a first lifting device, a second lifting device, a first installation base, a second installation base, a movable idler wheel, a rubber sleeve and a polishing idler wheel. The fixed strip is parallel to the movable strip, the fixed strip and the movable strip are oppositely arranged, the movable strip is connected with a push-pull device, the push-pull device drives the movable strip to move in the direction perpendicular to the fixed strip, the upper end face of the fixed strip and the upper end face of the movable strip are each provided with a plurality of limiting idler wheels, and the central axis of each limiting idler wheel is vertically arranged. The limiting rollers are arranged on the opposite sides of the fixed strip and the movable strip, so that the two ends of the guide rail are limited, rolling friction exists between the gu