The inflatable wing is a good innovational conception for the near space solar-powered aircraft. The problems of configuration characteristics and aerodynamic analysis of inflatable wings were taken as the aim of the current study. First, configuration characteristics were analyzed and designed. Then the model of 3d network inflatable wing was developed. With computational fluid dynamics method, aerodynamic performances of 2d inflatable wing profile and 3d network inflatable wing were studied. Numerical simulation result shows that the aerodynamic performances of 2d inflatable wing profile and 3d network inflatable wing have reduced slightly at the design Reynolds number. Meanwhile, with the structure of flow field and mechanism analysis, the reason for the total drag coefficients of inflatable wings increasing significantly lies in that, in those bumpy areas of the inflatable wing, vortexes which cause the friction drag has a reduction in some extent, but the pressure drag has a significant increase, so the total aerodynamic performance decreases.