The invention relates to the technical field of protection paint, in particular to rust-proof paint. The rust-proof paint is prepared from the following components: styrene-acrylic emulsion, pure acrylic emulsion, a compound tackifier, zinc-magnesium alloy micro powder, iron oxide red, aluminium triphosphate, poly(ethyleneglycol-co-propyleneglycol)monobutylether, an anti-flash rust agent, titaniumdioxide, texanol, a preservative, a defoaming agent, a dispersion agent and water; the compound tackifier is a special composition prepared by compounding substances of mucopolysaccharide, modified cellulose, modified starch and the like; the anti-flash rust agent is prepared from alkyl imidazoline amide, alkylbenzo triazole, sodium nitrite and disodium ethylene diamine tetraacetic acid. The weather resistance of the rust-proof paint is high, and the oxidation resistance and corrosion resistance performance is outstanding; moreover, the rust-proof paint has higher adhesion strength, the heatresistance and low temperature resistance performance is better, and the paint is not prone to fall off.