Abstract: In the context of the increasingly acute contradiction between global energy supply and demand, the Space Solar Power Station(SSPS) has emerged as a crucial research area. While the SSPS-OMEGA xhibits certain advantages, it also confronts issues such as splicing errors, structural deformations, and challenges in transportation and assembly.By establishing various finite element analysis models, applying pneumatic loads to the reflective surface and spherical surface under different working conditions and considering the influence of various factors, the results show that the accuracy of the reflective surface profile, the focal length and the stress are within the controllable range, which proves the feasibility of the inflatable design.