Abstract: Ru(Schiff-base) complex, a novel catalyst for benzene hydrogenation at low temperature, was encapsulated in the supercages of zeolite Y by flexible ligand method. The results of XRD, N2-desorption, FT-IR, DRS, DTA and catalytic reaction show that Schiff-base ligands in the prepared composite catalyst changed the electronic state of central metal atom, thus made the catalyst to form transition coordinative state with reaction substrate more easily and facilitating the product formation. Compared with Ru/Y prepared by ion-exchange method, in pure benzene hydrogenation, the catalytic activity of Ru(Schiff-base)/Y increased significantly. Simultaneously, the geometry size of different Schiff-base ligands has strong influence on the catalytic performance of prepared composite catalysts.