The invention discloses a self-layered gradient fluorine-silicon-based superhydrophobic coating and a preparation process thereof. The self-layered gradient fluorine-silicon-based superhydrophobic coating material is composed of A component and B component, and the A component is composed of fluorine-silicon Resin, dilution solvent, dispersion solvent, modified nano-SiO 2 Powder, modified nano silica sol, coupling agent, defoamer and leveling agent, the B component is aliphatic polyisocyanate. The method can solve the shortcomings in the prior art such as complex preparation process of the superhydrophobic coating, long drying time, high cross-linking and curing temperature, and double layers on the bottom surface. The water contact angle of the superhydrophobic coating prepared by the invention can reach more than 151°, and the rolling angle is about 3°. The preparation process is simple and easy, no expensive and complicated equipment is needed, and adhesion, superhydrophobicity, and good flexibility are taken into account.