Plastic Conjugate Ring absorbs the advantages of saddle packing and ring packing with more compact and symmetrical structure. The polypropylene conjugated ring packing is equivalent to cutting the step ring in half along the axial direction, and then connecting one half of it by reversing 108°, in which each semicircular member has a semicircular fin in the middle. The function of the fin is to increase the mass transfer surface area, improve the mass transfer performance, and prevent the overlap between the packing body when the packing body is in bulk. The characteristics of polypropylene conjugated ring packing is that the inner ribs are conjugated, and the symmetry is high. When stacked in the tower, it is very uniform, and there will be no overlap along the axial direction. So that the liquid on the surface of the packing can reach uniform distribution; There are more contact points between the inner rib and the surface of the adjacent filler, which strengthens the convergence and dispersion of the rib liquid and promotes the surface renewal of the gas-liquid contact. These characteristics make the polypropylene conjugated ring packing have the characteristics of small pressure drop, large gas-liquid contact surface area, excellent hydrodynamics and mass transfer performance, etc.