The invention relates to a hydrogenation catalyst, and a preparation method thereof. The preparation method comprise following steps: 1, dipping is adopted to load a carrier with a water soluble salt and an organic complexing agent of hydrogenation metal active components, and drying and roasting are carried out to obtain a semi-finished catalyst, wherein roasting conditions are designed based on the total amount of the semi-finished catalyst, and carbon content of the semi-finished catalyst ranges from 0.03 to 0.5wt%; 2, a solution containing the organic complexing agent is taken as a dipping solution for dipping of the semi-finished catalyst obtained in step 1), and then drying is carried out without roasting; and 3) the carrier is loaded with a non-metallic element which is taken as an accessory ingredient, wherein the step 3) is carried out for one time or a plurality of times before, in, and after the step 1) and before the step 2). The activity of the hydrogenation catalyst is increased obviously, and the service life is prolonged obviously.