Method for preparing hydrogenation purification catalyst

333A method for producing a hydrorefining catalyst is used to produce the hydrorefining catalyst which contains an inorganic oxide carrier and a hydrogenation-active metal and which has such a bimodal pore characteristic that pores having pore diameters of not more than 50 nm have a pore volume of not less than 0.4 cm/g, pores having pore diameters of not less than 50 nm have a pore volume of not less than 0.2 cm/g, and pores having pore diameters of not less than 1000 nm have a pore volume of not more than 0.1 cm/g. The method comprises the steps of mixing and forming a pseudo-boehmite powder having a dispersibility index of 0.13 to 0.28, and calcinating the formed pseudo-boehmite under a condition in which the pseudo-boehmite is converted into γ-alumina. The hydrorefining catalyst, which has the bimodal pore characteristic, can be produced easily at low cost.