Gasification is the key technology of translating biomass into clean gas which can be used as nature gas to provide gas, heat and electricity for users. After more than twenty years development of biomass gasification technology, the distributed biomass gas supply system has been built for civilian use, and the technology has the basis for large-scale gas producing and electricity generation. In the Twelfth-Five Year Plan, technologies that can obviously improve the gas quality become an important research direction, such as oxygen-enriched gasification, steam gasification and making Bio-SNG by methanation reaction. It is the necessity for equipment manufacturing and designing to be large-scale, seriation and standardization.