It is a kind of multi-layer functionalized polyester composite film material, which is processed by dyeing, magnetron sputtering, lamination and other processes on multi-layer ultra-thin and highly transparent polyester film, and is equipped with adhesive backing, which is pasted on the surface of architectural glass to improve the performance of glass, so that it has the functions of heat preservation, heat insulation, energy saving, ultraviolet protection, beautification appearance, privacy avoidance, explosion-proof, safety and protection.