With the aim to solve the specific problem of low utilization rate of small wind turbine generator blade radial flow, in order to investigate the long eared owl wing structure, the bionic coupling technology was adopted. The wing structure of the reverse reconstruction for the long eared owl was built by 3D Scanner laser scanner system and the bionic coupling blades structure theory model was established based on the wing feathers of sequential arrangement way. Through the comparison of the baseline NACA 0015 airfoil and the bionic coupling blades structure airfoil, the lift coefficient for the bionic coupling blades structure airfoil increases with blade pitch and chord length ratio s/c decreases. When s/c=0.33, the CL value is the highest at α=16°, CL=1.26, which increases by 13.5% than baseline foil.