The utility model relates to the technical field of steel beam structure frames. The utility model further discloses a modular multi-story and high-rise assembly type steel structure occluded steel beam frame center supporting system. The device comprises a center column base, a main cross beam is fixed to the edge of the side surface of the center column base through welding, a second stiffeningbase is welded to one end of the side face of the main cross beam, an auxiliary beam is welded to the other end of the main cross beam, and an auxiliary fixing angle is welded to the joint of the auxiliary beam and the main cross beam; stiffening seats are welded on the main cross beam and the auxiliary beam; a stiffening rope is arranged on the stiffening seat; the force between the main cross beam and the auxiliary beam can be increased through the stiffening ropes; the structural stability of the support system is improved; the reinforcing plate seats screwed through the threads are arranged between the cross beams of the supporting system, and the shock pads are arranged on the reinforcing plate seats, so that when the plate blocks and the top plate are arranged on the supporting system, the influence on the stability of the cross beams due to overlarge action in the mounting process can be avoided, and the stability of the device is improved.