The invention discloses a fluorine-containing epoxy resin and a preparation method thereof and a double-super-hydrophobic surface preparing from the fluorine-containing epoxy resin. The preparation method comprises the following steps: dissolving an epoxy resin in a solvent B, adding a dispersible compound, a fluorine-containing compound and a catalyst with stirring at a temperature of 60 to 120 DEG C, carrying out a reaction for 4 to 10 h and then successively carrying out cooling to room temperature, condensation, reprecipitation into a solvent F and drying so as to obtain the fluorine-containing epoxy resin. According to the invention, a chemical grafting method is adopted to graft the fluorine-containing compound onto the epoxy resin, a part of epoxy groups are retained, so it is ensured that the fluorine-containing compound is firmly adhered on the surface of a substrate in the form of a polymer and a constructed double-super-hydrophobic coating has good endurance. The fluorine-containing epoxy resin has good compatibility with inorganic nanoparticles, so roughness of an eventually constructed double-super-hydrophobic interface can be flexibly adjusted through addition of the inorganic nanoparticles; and thus, a better double-super-hydrophobic surface can be obtained.