Biomass gasification power generation (http://www.feng-yu.com) system uses the high technology of biomass circulating fluidized bed gasification to convert biomass waste, including wood, straw, rice straw, rice husks, bagasse and other solid wastes, into combustible gas. After being purified, the gas is then sent to the gas internal combustion engine for power generation, achieving the purpose of replacing oil with gas and reducing the cost of power generation. The key technologies include biomass gasification process, tar treatment and gas purification, tar wastewater treatment and its recycling use, gas power generation and system control technology, etc.