Automobile brake disc polishing and repairing machine and operation method thereof

The invention discloses an automobile brake disc polishing and repairing machine and an operation method thereof. The automobile brake disc polishing and repairing machine structurally comprises a cutter, a power device, an illuminating lamp, a balance clamp, a rotating shaft, a supporting device, a scrap collecting table and a machine body. Through additional arrangement, through the arrangement of the supporting device, after a brake disc is mounted on the rotating shaft and fixed by the balancing fixture, the tail end of the rotating shaft can be supported under the condition that rotation of the rotating shaft is not affected, the tail end of the rotating shaft is prevented from being suspended, the rotating shaft can be supported, the rotating shaft is prevented from being bent, the brake disc and the rotating shaft can be kept perpendicular, and thus the uniformity of the grinding thickness of the brake disc can be improved; and through the arrangement of a brake disc support, the brake disc can be supp