Polishing and grinding device for jewelry showcase decoration

The utility model discloses a polishing and grinding device for jewelry showcase decoration, and relates to the technical field of polishing and grinding devices. Comprising a machine body, anti-skid teeth are arranged on the outer wall of the machine body, a metal shell is fixedly connected to the back face of the machine body, one side of the metal shell is in threaded connection with a handle and a limiting assembly, and the limiting assembly is arranged on the outer wall of the machine body and comprises a fixing frame, a moving plate, a fixing gear, a fixing column and a connecting rod; the top end of the movable plate is fixedly connected with the bottom end of the fixed gear, the top end of the fixed gear is fixedly connected with the bottom end of the fixed column, the limiting assembly is arranged, the fixed frame and the movable plate are matched with each other through the design of the limiting assembly, and under the effect of the worm, the linkage gear is stressed to rotate; and the movable plat