Improved high-reflection mirror coating

The invention relates to an improved high-reflection mirror coating which comprises a high-refractive-index layer, a low-refractive-index layer, an auxiliary layer and at least one composite layer which are sequentially arranged, and the auxiliary layer is used for diffusion blocking and adhesion promotion of high-reflection metal materials. And the high-reflection mirror surface coating is coated on the film-coated surface of the metal base material. The composite layer is located between the auxiliary layer and the metal substrate. The composite layer comprises a silver coating, an ultrathin coating, a middle layer and an aluminum coating which are sequentially arranged, the middle layer is made of zinc oxide or metal-doped zinc oxide materials, and the ultrathin coating is made of chromium, chromium alloy, nickel, nickel alloy and/or nickel-chromium alloy materials. When at least two composite layers are arranged, the composite layers are stacked one by one. By means of the structure, the high-reflection m