The invention middle gripper for clamping the both side surfaces of the relates to beokyum device for sealing the opening of a dual gripper-type packing device for applying the dual gripper-type packaging device consisting of pivoted gripper on both sides around the middle of the gripper of the packaging device, bags and combination that combines a dual-type package gripper device comprises a means for pivoting the gripper; And forming a second connecting means coupling hole to rotatably coupled through the connecting means to the coupling means and the second connecting means is loaded into the lower coupling holes to form a vacuum suction part coupling hole; A vacuum suction unit configured to continuously adsorb the center of the combined vacuum suction part coupling hole of the rod bag to rotate such as by rotation of the rod; consists of, that adsorb the front, reverse side of the bag the encapsulation by the vacuum suction portion pivoting the gripper is configured to as widen rotation in response to the position change occurring, the opening of the bag smoothly made can be set includes filling is made smoothly into the bag, bag and by vacuum suction unit for rotation to prevent damage to the vacuum suction cup and the vacuum portion, so as to form a spring returning to its original position after rotation of the rod provides a bag opening apparatus of continuous operation for beokyum dual gripper type packaging apparatus.