The invention provides a metal surface automatic coating production line comprising a first coating area and a second coating area. Each of the first coating area and the second coating area is provided with a dehumidification device, a dust removal system, an automatic paint spray device, a leveling area, a baking area and a cooling area successively; to-be-coated objects are transferred in the first coating area, in the second coating area and between the first coating area and the second coating area via a conveyor; the coating production line is arranged in a dust-free workshop. A metal surface automatic coating production process comprises the successive steps of assembly and work piece feeding, preheating and dehumidifying, manual electrostatic dust removal, automatic electrostatic dust removal, priming paint spray, primary leveling, primary baking, primary cooling, offline vacuum coating, loading to the line, dehumidification, dust removal, finish paint automatic spray, secondary leveling, secondary baking, secondary cooling, and discharging. The metal surface automatic coating production line and the metal surface automatic coating production process have the advantages of environmental production, high efficiency and low production cost and can replace traditional electroplating.