NOVELTY - Biomass dry distillation and pyrolysis gas purification device comprises a cyclone dust collector (1), a catalyst converter (2), a cooler (3) and a filler (4), where a gas outlet of a gas conveying pipe is tightly connected with the device. The biomass gas generated by the pyrolysis biomass is introduced into the cyclone dust collector through the gas conveying pipeline, and separating the dust, and removing the granular impurities present in the biomass. The catalyst converter is connected with the cyclone dust collector. The catalyst converter utilizes the tar catalyst.    USE - Used as a biomass dry distillation and pyrolysis gas purification device.    ADVANTAGE - The device avoids the wet purification which is easy to generate pollution; and the biomass gas processed by the device has high quality which reaches standard requirement of national fuel gas.    DETAILED DESCRIPTION - Biomass dry distillation and pyrolysis gas purification device comprises a cyclone dust collector (1), a catalyst converter (2), a cooler (3) and a filler (4), where a gas outlet of a gas conveying pipe is tightly connected with the device. The biomass gas generated by the pyrolysis biomass is introduced into the cyclone dust collector through the gas conveying pipeline, and separating the dust, and removing the granular impurities present in the biomass. The catalyst converter is connected with the cyclone dust collector. The catalyst converter utilizes the tar catalyst produced by catalytic cracking of macromolecule tar. The tar catalyst is passed through the catalyst through the cyclone dust collector. After dust separation and purification the biomass gas is introduced into the catalyst converter and catalytic cracking is performed to convert biomass gas to combustible gas. The cooler is connected with the catalyst converter. The output obtained after catalytic cracking in the catalyst converter is subjected to cooling in the cooler and the separation of the condensable gas is achieved. The filler is connected with the cooler. The filter uses adsorption filler made of non-cracked tar for adsorbing the tar. The output obtained from the cooler is passed into the filter and adsorption and filtration is performed.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the biomass dry distillation and pyrolysis gas purification device (Drawing includes non-English language text).    Cyclone dust collector (1)    Catalyst converter (2)    Cooler (3)    Filler (4)