Radiation cooling coated metal plate is a new type of composite material. By arranging a radiation cooling layer on the metal substrate, it can radiate energy in the form of infrared electromagnetic waves to achieve cooling effect. The plate has an infrared emissivity of up to 0.93 in the wavelength range of 8-14 microns, which effectively radiates heat into outer space, reduces the retention of heat in the atmosphere, and thereby reduces the temperature of objects in contact with the plate. The product is suitable for many fields such as large buildings, industrial plants, logistics and transportation, etc., helping to reduce the room temperature by 10-16°C and meet the national environmental protection and energy conservation requirements for large buildings.