The invention provides a two-level cooperative motion control system for multiple motion platforms so as to realize dynamic cooperation of mutual motions and avoid occurrence of interference, and belongs to the field of ground microgravity simulation for space robots. The two-level cooperative motion control system comprises N two-dimensional motion platforms, N first-level controllers, N constant tension system, a second-level controller, cameras and a target, and is characterized in that each first-level controller controls motions of one two-dimensional motion platform; each two-dimensional motion platform is provided with one constant tension system; the target is arranged on a moving component, and the camera performs imaging on the moving component suspended below the constant tension systems by referring to the target; the first-level controllers acquires the tracking deviation of projections of the corresponding two-dimensional motion platform and the moving component in a horizontal plane according to imaging of the cameras, and controls the corresponding two-dimensional motion platform to move according to the tracking deviation until the tracking deviation is eliminated; and the second-level controller is used for controlling motions of N two-dimensional motion platforms in a coordinated manner according to positions of the N two-dimensional motion platforms so as to avoid interference among the two-dimensional motion platforms.