Abstract: The feed residue and hydrotreated residue of Qilu VRDS unit were separated by supercritical fluid extraction technology. The extraction information under the same treating conditions, and the properties of narrow fractions from the two residues were analyzed. The results show that hydrotreated residue can be effectively separated by the supercritical fluid extraction technology. The removal rates of metals and Conradson carbon residue and desulfurization rate of hydrotreated residue are all significantly higher than the feedstock residue. The hydrotreated residue is more suitable for solvent deasphalting process to produce deasphalting oil.