Abstract: The catalyst of Cl－/Fe2O3 was prepared by hydrothermal synthesis. In this paper，rice husk，pubescens and corn stalk were liquefied by using Cl－/Fe2O3 as catalyst. The influences of the amount of the catalyst，reaction temperature and reaction time on the catalyst activity for the biomass conversion were investigated，and the life test of the catalyst was carried out. The results showed that Cl－/Fe2O3 could be used as the catalyst in the liquefaction of biomass. The best operation conditions were reaction temperature of 300 ℃，reaction time of 3 hours and the amount of the catalyst of 4% (wt%). The catalyst was re-used 5 times，and the conversion of corn stalk was up to 90%. All the above results showed that the catalyst had good activity and stability.