Polishing device and polishing method for circular ring component

The invention provides a grinding device and method for a circular ring component, and the grinding device at least comprises a rack which serves as a shell of the device, and the interior of the rack comprises an upper surface and a lower surface; the driving structure is mounted on the upper surface; the grinding structure is connected with the driving mechanism, and the driving mechanism is allowed to drive the grinding structure to horizontally move, vertically move or rotate in a reciprocating mode; the carrying structure is arranged on the lower surface, the carrying structure comprises a polishing table, the polishing table is arranged in a shape of at least three layers of circular truncated cones, the diameters of the three layers of circular truncated cones are gradually increased from inside to outside, and the heights of the three layers of circular truncated cones are gradually decreased from inside to outside; and the vacuum adsorption structure is arranged between the object carrying structure