In order to deal with the energy risks caused by the aging of the satellite biaxial driving solar array and the collision of small space debris, this paper made a comparative analysis of the historical state of the same satellite biaxial driving solar array and the state of different satellite solar array in the same series through the method of horizontal and vertical comparison, and made a preliminary judgment on the damage of the solar array. After the abnormality is determined, the difference between the actual output and theoretical output of the solar cell array is analyzed through the method of split array joint calculation, and the damage situation is specific positioning and quantitative. Finally, the solar cell array output of the satellite with damaged sailboard meets the requirements of the platform and load, as well as the charge and discharge requirements of the battery bank are analyzed. The damaged state analysis and energy assessment of the solar array can be carried out quickly and in detail, which is an important basis for energy management after the damaged satellite solar array.