Abstract: Superhydrophobic coatings with excellent corrosion resistance, self-cleaning, anti-fog, drag reduction, or icing resistance have been paid more and more attention due to their applications in the engineering and coatings industry. In addition, the application of superhydrophobic coatings can be greatly expanded by introducing functional fillers such as heat insulation, anti-icing, flame retardant, and anti-corrosion into the coating. In this paper, the mechanism of superhydrophobic coating is first reviewed, and the classical wetting theory of superhydrophobic coating is further described, including Young's model, Wenzel model, and Cassie-Baxter model. The characteristics of different preparation methods of superhydrophobic coatings are compared, subsequently. Finally, the main problems existing in the development of superhydrophobic coatings are pointed out by introducing the research progress of multifunctional superhydrophobic coatings, and the development direction of superhydrophobic coatings is proposed.