The invention relates to a tower crane self-reshipment supporting system device. A tower crane comprises a slewing bearing device with a top platform; the tower crane self-reshipment supporting system device comprises a reshipment device and a power device; the reshipment device is arranged on the top platform and provided with a self-guided beam and a pulley block, the self-guided beam is provided with an inner end connected with the top platform and an outer end suspended outside the slewing bearing device, and the pulley block is provided with a movable pulley and a hook head connected with the movable pulley; the power device is provided with a winch arranged on the tower crane and a steel wire rope, one end of the steel wire rope is connected to the winch in a wound manner, and the other end of the steel wire rope is wound around the movable pulley; and the winch controls unwinding or winding of the steel wire rope so as to pull the hook head to move in the vertical direction. By means of the above technical scheme, the tower crane self-reshipment supporting system device solves the technical problems that the tower crane cannot be efficiently used, and the working period is prolonged, and the aim of achieving steel beam self-reshipment by the tower crane is achieved.