Brake disc polishing device

The utility model relates to a brake disc polishing device, and relates to the technical field of polishing devices.The brake disc polishing device comprises a workbench, a mounting mechanism used for stabilizing a brake disc is arranged in the middle of the workbench, the mounting mechanism is rotationally connected with the workbench, polishing mechanisms are arranged on the two sides of the workbench, and each polishing mechanism comprises a supporting frame and a base; the supporting frame is fixedly provided with a first hydraulic cylinder enabling the base to ascend and descend, the base is slidably connected with a sliding block in the horizontal direction, a U-shaped polishing block is arranged on the opposite side of the sliding block, and a center opening of the polishing block is larger than the edge thickness of the brake disc and faces the brake disc. The brake disc polishing device has the effects that the two sides of the brake disc can be polished without shutdown overturning, and the polishin