Steel structure protection includes fireproofing, anti-corrosion and anti-rust. Generally, it is not required to be rust-proof after treatment with fire-retardant coatings, but it is still required to be treated in corrosion in buildings with corrosive gases. There are many types of domestic fireproof coatings, such as TN series, MC-10, etc. Among them, MC-10 fireproof coatings include alkyd enamel, chlorinated rubber paint, fluororubber coating and chlorosulfonated coating. Appropriate paint and coating thickness should be selected according to steel structure type, fire resistance grade requirements and environmental requirements during construction.