Fireproof paint with stability used for lost foam

The invention discloses a fireproof paint with stability used for lost foam, which comprises the following components by weight: 20-30 parts of propylene glycol methyl ether acetate, 12-15 parts of polyvinyl acetate, 7-9 parts of acid butyl phosphate, 3=5 parts of composite fire retardant, 2-4 parts of cellulose ether, 0.6-0.8 parts of vinyl acetate, 0.2-0.5 parts of sodium silicate, 1-1.5 parts of 2,4-dyhydroxyl benzophenone, 2-4 parts of dicyandiamide and 6-8 parts of solvent. The prepared fireproof paint has high stability, is capable of reducing combustibility on the surface of the lost foam and increasing the fireproof limitation of the material to be coated, and has characteristics of acid resistance and corrosion resistance; the coating has good luster performance and toughness, is difficultly cracked under drying or wetting condition, performance is excellent and stable, and the application prospect is wide.