The invention discloses a non-ferrous metal polishing and grinding device. The non-ferrous metal polishing and grinding device comprises a workbench, a power supply is fixedly installed on the left side of the upper surface of the workbench, a grinding belt is fixedly arranged above a dust collecting plate, a second motor is fixedly installed above the right side of the outer shell of a grinding machine, a grinding column is fixedly installed below the second motor, a polishing machine shell is fixedly installed on the right side of the grinding column, a control panel is fixedly installed onthe outer surface of the polishing machine shell, a rotary polishing column is fixedly arranged in the polishing machine shell, a first motor is fixedly installed on the right side of the polishing machine shell, a polishing disk is fixedly installed above the first motor, an exhaust port is fixedly installed above the polishing disk, the grinding belt, a control button, the second motor, the rotary throwing column, the control panel and the first motor are electrically connected with the power supply. The non-ferrous metal polishing and grinding device is simple in structure, convenient to use, practical, stable in structure and capable of achieving the purpose of non-ferrous metal polishing and grinding.