The utility model discloses a tower filler-conjugate ring used for the separating process of the mass transfer. The tower filler-conjugate ring is formed through the upper and lower conjugation and overlap of the two semi-circular rings with the same structure on the end portions of the two semi-circular rings. The tower filler-conjugate ring combines the advantages of an annular filler and an open type filler and abandons the deficiencies of the annular filler and the open type filler. The tower filler-conjugate ring has higher mechanical strength, open structure, small stacking density, and large void ratio; while being stacked, the tower filler-conjugate rings which can not be sheathed again are in point-contact mutually; the resistance force which passes through the fluid is small; the gas and the liquor can be evenly distributed, and the contact is favorable. The hydrodynamic performance and the mass transfer performance of the tower filler-conjugate rings are better than the cascade ring which is presently and generally accepted to be the most advanced at home and abroad.