The steel structure (long-term) protective coating support system is a system of products made from epoxy zinc-rich primer with excellent cathodic protection performance, as well as epoxy mica iron intermediate paint with an excellent shielding effect and acrylic polyurethane topcoat or fluorocarbon topcoat with excellent weather resistance and color retention functions. Featuring excellent corrosion, rust and weather resistance and color retention performance, the product system is a reliable anti-corrosion product system with a proven track record in the market, with wide use in steel structure renovation and maintenance coating projects under all kinds of atmospheric environments, including bridges, petrochemical refineries, thermal power plants, wind power stations, steel mills, chemical plants and paper mills.