The power of airship′s curved solar array is closely related to the position of airship, time of flight, flight of attitude, layout of solar array and so on. Through the analysis of solar radiation model, and combined with the variation of azimuthal angle in the course of stratospheric airship′s flight, the projection was used to calculate the power of curved solar array, thus the dynamical power generation of the airship was calculated. The analysis results show that the projection in horizontal is the main component of curved solar array′s power, which is little influenced by airship′s azimuthal angle; the power of projections in vertical is smaller, which is more easily affected by airship′s azimuthal angle.