This invention relates to a method for preparing hydrogenation catalyst for hydrogenating low-grade heavy fraction gasoline. The hydrogenation catalyst uses microporous molecular sieve/mesoporous composite oxide as the carrier. The carrier is prepared by in-situ growing Ti-Si or Ti-Al mesoporous composite oxide on the surface of the microporous molecular sieve. The pores can be expanded by acid treatment or by adding acidic component P in the composite carrier to obtain hydrogenation catalyst with large specific surface area, high pore volume, gradient pore distribution and controllable acidity, which can satisfy the requirements of desulfurization, denitrification and aromatic hydrocarbon saturation with different degrees. The catalyst has good performance on hydrogenation, desulfurization and denitrification. |