The invention relates to the technical field of preparation of electronic component paint, in particular to a preparation method of a two-component high-adhesion pollution flashover-prevention fluorocarbon coating for a hard mask. The preparation method comprises the following steps: with waxberries, grapes and tea leaves as raw materials, degrading cellulose in the raw materials into glucose withcellulose and fermenting, and mixing a fermentation filtrate with fluorocarbon resin, water glass, magnesium oxide, monopotassium phosphate and the like to prepare the two-component fluorocarbon coating, wherein a proper amount of MgO powder is mixed in the water glass in a component A, then a layer of coating component B is coated, and phosphate in the component B is in an acid-base neutralization reaction with the MgO powder on the surface of an insulator. The fluorocarbon resin is taken as a film forming matter, so that the oxidation resistance of the coating is further improved; an organic acid composition and silicon dioxide generated by sodium carbonate in the component A improve the adhesion of a film; silicon dioxide is mixed to improve the hardness of the coating and the mechanical property of the film; and therefore, the two-component high-adhesion pollution flashover-prevention fluorocarbon coating has a wide application prospect.