Abstract: The basic equations of energy equilibrium of solar panel in several typical heat environments and the equations for the space heat radiation angle coefficients are obtained py the principle of energy equilibrium. The angle coefficients and the maximum temperature fluctuation are obtained for a solar panel at different orbits by the method of numerical integration. After considering this temperature effect the intrinsic frequency characteristics of the solar panel is analysed and calculated by the finite element method. The result shows that the effect of dynamic characteristics of selsr panel of the spacecraft in orbits between shaded and sun lit parts can not be ignored.