Metal polishing device

The utility model provides a metal polishing device which comprises a machine frame, a conveying belt is arranged in the machine frame, a placing table is arranged on the conveying belt, and a suction cup is arranged in the middle of the placing table. The utility model has the advantages that the conveyor belt is started and drives the metal block to move below the portal frame; an electric push rod is started, the electric push rod pushes a second mounting disc to move towards the inner side, in the process, a second extrusion block extrudes a pressing plate, the pressing plate moves downwards and compresses the metal block, meanwhile, a second grinding wheel makes contact with the metal block, a second grinding motor is started, and the second grinding motor drives the second grinding wheel to rotate to grind the metal block. According to the metal block polishing device, the metal block is simply fixed through the suction cup and other structures, then the metal block is further fixed through the pressing