In order to study the aerodynamic characteristics of deformable wing in the process of dynamic deformation, the moving mesh technique in numerical simulation software FLUENT was used to simulate the aerodynamic characteristic of deformable wing at different deformation speed in different deformation process, such as variable span, variable sweep and variable airfoil. The results showed that different deformation mode and deformation speed of the wing had different impact on the aerodynamic characteristics of the wing, and variable span had little effect on deformation speed. The variable sweep and variable airfoil were sensitive to it. The analysis results were of great significance to the study of deformable aerocrafe.