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The comprehensive utilization of resources is a major technological and economic policy of China.The development of utilizing Biomass to form high efficiency and high value industry,to change high biomass-consuming manufacture mode at present is very important for sustainable development of biomass industry.Conversion utilization of Biomass resources is the priority theme of science and technology development planning of china.Ethylene glycol and ethanol as liquefaction technology is an important way to achieve conversion utilization of Biomass.Although the research of liquefaction technology and structural characterization is more,technological study pursues low residue rate,structural characterization study is not complete and mechanism study is not deep enough which restrict the further use of liquefied products.