The invention discloses a polishing machine device capable of achieving automatic and uniform waxing. The device comprises a box body, a through groove with a downward opening is formed in the bottomwall of the box body, wax block automatic lifting mechanisms are symmetrically mounted on the left side and the right side of the through groove, a roller cavity is formed in the top wall of the through groove, a roller is mounted in the roller cavity, roller mechanisms are symmetrically mounted on the front side and the rear side of the roller, a polishing disc is mounted in the roller cavity, the top wall of the polishing disc is fixedly connected with a spline shaft, the top end of the spline shaft is fixedly connected with a gear ring, the gear ring and the spline shaft are located in a lifting cavity, the spline shaft and a rotating shaft are slidingly connected, the rotating shaft and the box body are rotatably connected, a shifting rod located on the lower side of the gear ring andslidingly connected with the box body is fixedly connected with the front end wall of the spline shaft, the front end of the shifting rod extends out of the device, a speed change mechanism is mountedon the right side of the lifting cavity, the polishing disc can be automatically waxed, coating is uniform, along with use of a wax block, the height of the wax block is automatically increased, it is ensured that the roller is in contact with the wax block all the time, and polishing quality is ensured.