The invention discloses a flame-retardant anticorrosive paint for a high-speed rail bottom material. The flame-retardant anticorrosive paint is prepared from the following components: chlorinated polyvinyl chloride resin, m-xylene phenolic resin, fluorosilicone resin, zinc powder, tung oil, n-butyl alcohol, carbon tetrachloride, dipropylene glycol, diethylene glycol, salicylanilide, tetraethyl orthosilicate, titanium dioxide, silicon carbide, calcium aluminate, sodium diacetate, copper powder, manganese oxide, aluminum chloride, methylcellulose, p-cresol, ethylene bis stearamide, diatomite, fumed silica and barium sulfate. The flame-retardant anticorrosive paint provided by the invention has the advantages of high stability, shock resistance, abrasion resistance, high hardness, good adhesion, flame resistance, no shedding, high temperature resistance, corrosion resistance and oxidation resistance, and can be used in a refractory environment for a long time.