The multifunctional 7075 aviation aluminum alloy with excellent superhydrophobic property was prepared by a simple, low-cost, and efficient etching process. The impedance results show that charge transfer resistance of prepared superhydrophobic 7075 aluminum alloy increases, and the double-layer capacitance decreases obviously, thus significantly improving the corrosion resistance. This research is of great economic value and practical significance for developing low-cost and efficient anticorrosion technique for aviation materials.