Biomass gasification has high potential and can realize high efficient utilization of biomass.By gasification

all different types of biomass can be converted into syngas comprising hydrogen

carbon monoxide

carbon dioxide and methane

thus to increase the biomass utilization ratio.In this paper

the compact UNIQUE gasification process of biomass gasification and multistage gasification process are introduced

and the current polygeneration process route is illustrated.The principle of new biomass gasification technology such as Plasma gasification and supercritical water gasification are analyzed.The present situation of its application and advantages are pointed out.