Considering the situation of elastic deformation, the coupled aerodynamic-structural design was performed. In the study, the shared model technology of three -dimensional shape,the aerodynamic model and the finite element model was developed. Firstly,aerodynamic surface mesh, space air grid, as well as the finite element mesh must be generated based on the shared model technology. Secondly,It must be achieve that aerodynamic load transferred between the structure of model and aerodynamic model. Finally, the coupled aerodynamic-structural analyses is perform.It was iterative until reaching to the request of the convergence. During the procedure ,the aerodynamic model must be reconstructed according with the deformation of the model. The whole design ideal was that the nonlinear aerodynamics and the structure deformation was taken account to the flight load design ,which was better to research the aero elasticity of high-aspect ratio aircraft.