Abstract: The China Ⅵ standard compliant diesel fuel blending component was produced by hydro-upgrading two inferior raw oils. Under the same process conditions，the effect of the properties of the feedstocks on the distribution and properties of the hydro-upgraded products was investigated. The diesels from above two tests was mixed and used as raw material to investigate the effect of cut temperature for separation of light and heavy diesel on the properties of diesel density，composition, and cetane number. The results showed that the density，paraffin content，and cetane number of the light diesel and heavy diesel gradually increased with the increase of the cut point. The light diesel had a low cetane number and was a low-quality diesel blending component, and could be used as a raw material for catalytic cracking. The heavy diesel had a high cetane number，but with a high freezing point and needed to remove higher components further to become a high-quality No.0 China Ⅵ standard diesel blending component. In the case of above mixed diesel，at the conditions of cut point of 230℃and the freezing point at 0℃，the yield of heavy diesel components was the highest，and the cetane number could meet with the requirements of China Ⅵ standard.

Key words: Inferior feedstock, hydro-upgrading, cetane number, distillation range