Abstract: The historical failures of human flight imitating flying birds are summarized. In early times, humans just blindly imitated the shape and movement of birds' wings, but did not know anything about the aerodynamics of flapping wings. With the development of aerodynamics,various types of aircraft have been successfully invented, during which many innovations were inspired by bird flight aerodynamics, such as the design of low-speed airfoil, streamlined fuselage with small drag, horizontal tails, landing gear, and so on.