In order to increase the processing quantity of the catalytic cracking unit and the recovery of its light oil , it is necessary to discharge the slurry oil largely .This makes part of alkane and aromatics, which are the ideal components for the refinery , into the slurry oil causing the FCC feedstock loss.At present , the discharged slurry oil is partly used as the blending component for other units besides as the fuel oil , so , it is under utilized .To lift the reasonable utilization of it , furfural ex traction w as used to separate the slurry oil, this method can effectively separate the cracking part and the faction containing mass aromatics in slurry .The results show :the cracking par t of the slurry can be used as catalytic cracking feedstock or hydrocracking feedstock ;the faction containing mass aromatics can be applied to produce such chemicals as plasticizing agent , softening agent , asphalt , and so on.I ts application is an optimistic one .