The invention discloses a hydrogenation catalyst, a continuous production method and a continuous production device. The hydrogenation catalyst is a volume-phase hydrogenation catalyst comprising an alumina supporter, reactive metal and assistants. The reactive metal is selected from one or more of VIII-group and/or VIB-group metal elements. Based on the catalyst weight, the reactive metal comprises, by oxides, 1-9% of VIII-group metal and 5-25% of VIB-group metal, preferably, 1.0-5.0% of the VIII-group metal and 10-20% of the VIB-group metal. The assistants include phosphorus, fluorine and boron. The alumina supporter accounts for 66-94%. The density of epiphasic reactive metal in the hydrogenation catalyst is high, and the concentration of the reactive metal and the assistants graduallyincrease from inside to outside along the grain size. The hydrogenation catalyst, the continuous production method and the continuous production device have the advantages that the utilization rate ofthe hydrogenation reactive metal is high, surface acidity of the catalyst can be improved effectively, the inactivation speed of the catalyst is reduced, continuous production of the hydrogenation catalyst is realized, production efficiency is improved, and production cost is reduced.