The invention discloses a modified organic silicon-aluminum organic-solvent-resistant double-component paint which is formed by mixing a component A and a component B before coating. The component A comprises a modified silicon-aluminum sol, active monomers and an organic solvent A, and also comprises a filler and/or paint aids. The component B is mainly composed of a curing agent and an organic solvent B. The modified silicon-aluminum sol is prepared by grafting and doping an epoxy group silane coupling agent and an aluminum sol in an alkali regulator water solution. By using the aluminum-sol-grafted/doped epoxy-group-containing silane coupling agent as a film forming matter, the modified silicon-aluminum sol has excellent thixotropy and adhesiveness; and under the catalytic action of the curing agent, the aluminum sol can be quickly cured to form the high-compactness coating, and the coating has excellent adhesive properties with the basal plane.