High-temperature-resistant and corrosion-resistant high-reflection mirror surface coating film system

The invention discloses a high-temperature-resistant and corrosion-resistant high-reflection mirror surface coating film system, and relates to the technical field of film plating. The system includesa metal substrate, wherein a first auxiliary film layer, a high-reflection silver film layer, a second auxiliary film layer, a low-refractive-index coating and a high-refractive-index coating are sequentially plated on the film plating surface of the metal substrate, and the first auxiliary film layer and the second auxiliary film layer are both metals plated by adopting a common sputtering process; and a silicon nitride (Me: Si) NX compound which is a multifunctional comprehensive auxiliary layer, can provide the adhesion promotion, diffusion barrier and anti-oxidation effects, so that the high-reflection mirror surface coating film system can have the advantages of high durability, high reliability and the like under the high-temperature and corrosive environment conditions. Preferably,the metals or metal alloy