The research of Shijian-7 (SJ-7) solar array deployment on the ground was carried out using three methods, such as dynamic pressure simple formula, 3D-FLUENT simulation and generalized additive inertia method. For the first time the real-time coupling calculation was realized between multibody system dynamics and aerodynamics, and which is successfully applied on the research of the solar array. The results of the three different methods validate each other and get better precision than previous method. At the same time the simulation results are in accordance with the experiment results. The foregoing methods are applied on other solar array type which is being researched at present.