The invention relates to simulation equipment for ground integrated dynamic analog after a flexible solar wing is installed on a moonlet, in particular to a ground microgravity dynamic loading simulation mechanism for a satellite. The ground microgravity dynamic loading simulation mechanism for the satellite comprises a marble platform, a five-degree-of-freedom air-floating platform, a three-degree-of-freedom hoist, a two-dimensional servo platform, a Stewart platform, a constant force hanging mechanism, a solar wing follow truss and a loading mechanical arm. The three-degree-of-freedom hoist is arranged above the marble platform, a truss is arranged below the three-degree-of-freedom hoist, the two-dimensional servo platform and the Stewart platform are installed below the truss, the solar wing follow truss is installed below the Stewart platform, the loading mechanical arm is installed on the solar wing follow truss, the five-degree-of-freedom air-floating platform is placed on the marble platform, and a solar wing is installed on the five-degree-of-freedom air-floating platform. The constant force hanging mechanism is installed below the two-dimensional servo platform and is in spherical hinge connection with the center of mass of the solar wing. The ground microgravity dynamic loading simulation mechanism for the satellite has the advantages of being reliable in structure, accurate in pose following, complete and vivid in simulation, controllable in disturbance loading, safe to operate and the like.