The distribution of solar radiation intensity on the upper surface of the stratospheric airship is an important factor affecting the output performance of photovoltaic arrays. In order to analysis the influence of the dynamic change of the flight attitude of the stratospheric airship on its upper surface solar radiation intensity distribution characteristics and establish a calculation model of interactive coupling between the airship dynamics model and the solar radiation physical model was established. By using this mode, a certain airship example was calculated, the solar radiation intensity distribution on the upper surface of the stratospheric airship was also proposed under flight yaw and pitch angle change, and the characteristics of solar radiation intensity affected by airship flight attitude. The result can be used to guide the optimized layout and array configuration of the solar array on the stratospheric airship.