The results clearly indicated that as compared with the non-catalytic process, the presence of the K3PO4/Fe3O4 catalyst would decrease the bio-oil yield, but increase the phenolic yield. The peak area% values of the phenolics were 51.6%, 53.5%, 52.4% and 49.4% from 350 _C to 500 _C in the catalytic process, compared with the values below 30% in the non-catalytic process. The above results confirmed the catalytic capability of the K3PO4/ Fe3O4 catalyst to selectively produce phenolic-rich bio-oil.