The film-coated steel plate of Himei Metal first sends the base plate into the metal substrate heating device for heating to a high temperature of 180°C, and then immediately sends it into the middle of the upper and lower laminating rolls together with the decorative film. Using the pressure and high temperature of the upper and lower laminating rolls, The decorative film is hot-melted to the metal substrate, and it is firmly fused together, that is, the finished metal film-coated board.