The design of bionic flapping-wing aerial vehicle is inspired by birds, insects and bats in nature. The lift and the thrust for flight are generated by the active movement of the wings. By the advantages of good concealment and maneuverability, it has become the hotpot in the field of aerial vehicle at home and abroad in recent years. Because of low Reynolds number, unsteady aerodynamics and other issues, the study of bionic flapping-wing aerial vehicle is quite different from that of conventional fixed-wing aerial vehicle. There are three methods in the study of flapping-wing aerial vehicle: aerodynamic calculation, wind tunnel experiment and outside flight test. In terms of aerodynamic calculation, the theory and the method of unsteady aerodynamic design and optimization are still inadequate at present. The outside flight test cannot accurately measure the complex aerodynamic force of the aerial vehicle, and cannot conduct quantitative analysis and research on the aerial vehicle. Because the wind tunnel experiment can simulate the real situation of flight, the data obtained is more reliable and can be analyzed and studied quantitatively. Therefore, wind tunnel experiment has become a very effective method to study flapping-wing aerial vehicle. Researchers at home and abroad have carried out a large number of experimental studies on bionic flapping-wing aerial vehicle by using wind tunnel. This paper first introduces the composition and classification of the wind tunnel, and then introduces the research status of the wind tunnel experiment of bird-like and insect-like flapping-wing aerial vehicle in detail. Finally, this paper gives some suggestions on the possible research directions of wind tunnel experiment of the bionic flapping-wing aerial vehicle.