Caprolactam hydrofining catalyst, preparation method thereof and caprolactam hydrofining method

The invention provides a caprolactam hydrofining catalyst, a preparation method thereof and a caprolactam hydrofining method, the caprolactam hydrofining catalyst comprises a catalyst carrier and an active component Ni loaded on the catalyst carrier, the catalyst carrier comprises rare earth oxide modified aluminum oxide, a structure additive, a binder and a lubricant; in the rare earth oxide modified aluminum oxide, the mass ratio of the aluminum oxide to rare earth metal elements contained in the rare earth oxide is (15-50): 1. According to the present invention, 40-70% of one part of the rare earth oxide modified carrier is subjected to high temperature roasting so as to significantly improve the pore size of the carrier, and 30-60% of the other part of the rare earth oxide modified carrier is used as the subsequent molding binder, such that the obtained catalyst has characteristics of large pore size and narrow pore size distribution; the catalyst provided by the invention is applied to a fixed bed hydrog