Abstract: Domestic and overseas research progress in technology on high-pressure liquefaction of biomass is reviewed.The main factors affecting high-pressure liquefaction of biomass,such as material types,catalysts,solvents,reaction temperature,reaction time,reaction pressure and the atmosphere of reaction,etc.are summarized and analyzed.And it is pointed out that the technology on high-pressure liquefaction of biomass is one of conversion technologies which have great potential development.