Treatment system of biomass gasification tar

The invention discloses a treatment system of biomass gasification tar, which comprises a cyclone separator and a supercritical carbon dioxide extraction device, wherein a second gas inlet used for allowing biomass gasification gas to enter is formed in the cyclone separator; a carbon residue outlet is formed in the bottom of the cyclone separator; a second gas outlet is formed in the top of the cyclone separator; a third gas inlet communicating with the second gas outlet is formed in the top of the supercritical carbon dioxide extraction device; a separated object outlet is formed in the bottom of the supercritical carbon dioxide extraction device; and a third gas outlet is formed in the supercritical carbon dioxide extraction device. According to the treatment system, the cyclone separator and the supercritical carbon dioxide extraction device sequentially decoke the biomass gasification gas, so that a decoking effect is good, and the problems of high tar content in the biomass gasification gas, easy blocki