The variant aircraft can change its shape to adapt to different flight states and improve flight performance. Its design includes various disciplines such as aerodynamics, materials and structures. The research focuses on a new hypersonic vehicle concept machine. The applicability of the wing variable sweep design on this hypersonic aircraft is discussed, and the influence of the deformation design of directly extending the trailing edge of the wing on the aerodynamics of the aircraft is studied. First, obtained the 3D model of the hypersonic vehicle with different deformable wings. Then, based on the k-ε turbulence model in FLUENT, the numerical simulation of the external flow field around the hypersonic vehicle was carried out respectively. Finally, the aerodynamic characteristics of the hypersonic vehicle under different angles of attack and different wing deformation schemes were analyzed. The research results show that the variable-sweep wing scheme cannot achieve the goal of improving the lift-to-drag ratio under the design conditions of the hypersonic vehicle, and the deformation design of directly extending the wing can improve the aerodynamic characteristics of the hypersonic vehicle under the design conditions. The research results can provide reference for the design of hypersonic variant aircraft, and have certain practical value.