Process for producing fuel oil

A process for preparing fuel oil from tar fraction includes such steps as hydrogenating reaction between tar fraction, H2 and hydrorefining catalyst Mo-Ni/Al2O3 for removing S and N, the arylhydrocarbon saturation reaction on hydromodifying catalyst W-Mo-Ni/Al2O3 for further removing S and N, and separating out H2, dry gas, H2S, NH4 and liquefied gas to obtain fuel oil.