The invention discloses graphene oxide/copper silicate composite powder, a preparation method of the composite powder and application thereof in a super-hydrophobic coating. The graphene oxide/copper silicate composite powder with a micro-nano structure on the surface comprises a core formed by flake graphene oxide and a shell layer formed by needle-like nano copper silicate, wherein the needle-like nano copper silicate is arranged on the surface of the core in an array form. The super-hydrophobic coating is prepared by the following steps: coating the surface of a base material with the graphene oxide/copper silicate composite powder with the micro-nano structure on the surface, drying, and performing fluoroalkyl silane low-surface energy treatment, thereby obtaining the product. The preparation method disclosed by the invention is mild in reaction conditions, easy to realize and excellent in process repeatability; the prepared high-transparency, self-cleaning and anticorrosive super-hydrophobic coating has a static water drop contact angle of not less than 150 degrees; the slide angle does not exceed 1 degree; and the light transmissivity is not lower than 90% in a visible-ultraviolet light wave range. The product has excellent corrosion resistance and is expected to be widely applied to the fields of automobiles, spaceflight, solar cells, articles of daily use and the like.