Product release chain conveying coating production line, including spray type pre-treatment equipment, moisture drying furnace, paint room, leveling room, paint drying furnace and product release chain conveying device, the spray type pre-treatment equipment, moisture drying furnace, paint room, leveling room and paint drying furnace through the product release chain conveying device connected in turn; The conveying unit in the accumulation chain conveying device passes through the spray-type pre-treatment equipment, water drying furnace, paint chamber, leveling chamber and paint drying furnace internally.