Provided are a catalyst composition for hydrogenation treatment and an application thereof; the catalyst composition comprises a hydrorefining catalyst I and a hydrorefining catalyst II; the hydrorefining catalyst I contains an alumina-containing carrier, and cobalt and molybdenum hydrogenation active metal components; with the catalyst I as a benchmark, in the catalyst I, the cobalt content in terms of CoO is 1-10 wt.%, and the molybdenum content in terms of MoO3 is 5-50 wt.%; the hydrorefining catalyst II contains an alumina-containing carrier, and nickel, molybdenum and tungsten hydrogenation active metal components; with the catalyst II as a benchmark, in the catalyst II, the nickel content in terms of NiO is 1-10 wt.%, the tungsten content in terms of WO3 is 5-50 wt.%, and the molybdenum content in terms of MoO3 is 1-20 wt.%; according to the volume and with the total amount of the catalyst composition as a benchmark, in the catalyst composition, the content of the catalyst I is 5-95%, and the content of the catalyst II is 5-95%. Compared with the prior art, the catalyst composition has better hydrogenation performance.