Hydrogenation catalyst takes activated carbon as carrier, and active metal component is palladium. The content of palladium in the catalyst is 0. 1wt% ~ 0.7wt%, and it is prepared by impregnation method. The preparation process of palladium-containing impregnating solution is to dissolve palladium acetylacetonate in organic solvent, and adjust the pH value of impregnating solution with low-carbon organic carboxylic acid.