With the development of high-performance UAV airfoil, exploring the basic principle of bionic airfoil aerodynamics is good for structural design of unmanned aircraft in order to improve the performance of the UAV. we research mainly includes two aspects: First, the bionic seagull airfoil and NACA4412 aviation airfoil lift coefficient, drag coefficient and lift-drag ratio analysis; compare different flow rate of fluid through the wing airfoil ambient pressure distribution. Bionic seagull airfoil compared with 4412 airfoil, the lift coefficient increased by 47.34%, the lift-drag ratio increased by 33.14%, and has good overall performance in a wide speed range bionic seagull airfoil. The bionic airfoil provides reference for the design of high-performance unmanned aerial vehicle.