In order to meet the application requirements of the wing deformation control of the smart wing, the flow spectrum structure of the supercritical aerofoil profile with microdeformation and the aerodynamic characteristic change under the condition of 10～500 μm of the microdeformation have been studied in this article. The piezoelectric ceramic actuator with the displacement of 5～290 μm and the maximum output force of 200 N has been developed. The proposed piezoelectric actuator can meet the requirement for the wing deformation control of the smart wing. The feasibility of piezoelectric ceramic actuator applied to the smart wing has been validated.