Ketone-benzol dewaxing, furfural refining, clay finishing and furfural refining, ketone-benzol dewaxing, clay finishing were selected, respectively, to process lube feedstock. The base oils processed by furfural refining, ketone-benzol dewaxing, clay finishing or ketone-benzol dewaxing, furfural refining, clay finishing were determined regarding their different chemical nature and their different physical properties. Group analysis, elemental analysis, infra-red spectrum, and H-1 nuclear magnetic resonance were also used to investigate the structure characteristics, the hydrocarbon characteristic, and branch sites of hydrocarbon of the base oils. Experimental data shows that furfural refining, ketone-benzol dewaxing, clay finishing may be available for factories in the manufacturing process of lube feedstock from Xijiang and Neil (1:1) crude oil No.3 fraction, but better properties of base oil can be obtained using more rigorous process conditions.