The invention relates to strippable heat-proof antirust protective 
film coating and a preparation method thereof. The 
raw material of the protective 
film coating is formed by paint and curing agent. The paint comprises, by weight, 88-96 parts of linear chain 
polyester resin or 
acrylic resin containing 
hydroxide radical, 2.0-5.0 parts of stripping 
accelerant, 1.0-3.0 parts of film-forming 
accelerant, 0.5-2.0 parts of antifoaming agent and 0.5-2.0 parts of flatting agent. The curing agent comprises, by weight, 25-40 parts 
isocyanate polymer. The linear chain 
polyester resin or the 
acrylic resin containing the 
hydroxide radical is heated and stirred and then added in other components except the curing agent, the 
isocyanate polymer is added in the mixture during usage, and the strippable heat-proof antirust protective 
film coating is obtained after even mixing. The strippable heat-proof antirust protective film 
coating does not contain 
solvent, meets environment-friendly requirements, simultaneously has high waterproof performance, oil resistance, 
temperature resistance, abrasion resistance and strippable performance, can have 
metal surfaces, stripping surfaces, plastic surfaces and the like at the same time, and has temporary antirust protection effects.