NOVELTY - Fluidized-bed biogas biological desulfurization device, comprises a tank body and a desulfurization liquid circulating pump (8). The upper part of tank body is fluidized filler area (6). The lower part of fluidized filler area is granular biological membrane attached filler layer (5). The granular biological membrane attached filler layer is set with biogas cloth air gas device (4). The biogas gas inlet (3) of outside the tank body is connected with biogas cloth air gas device. The lower part of biogas cloth air gas device is set with air gas distributing device.    USE - Used as fluidized-bed biogas biological desulfurization device.    ADVANTAGE - The device ensures stable desulfurization operation, saves energy and is economical.    DETAILED DESCRIPTION - Fluidized-bed biogas biological desulfurization device, comprises a tank body and a desulfurization liquid circulating pump (8). The upper part of tank body is fluidized filler area (6). The lower part of fluidized filler area is granular biological membrane attached filler layer (5). The granular biological membrane attached filler layer is set with biogas cloth air gas device (4). The biogas gas inlet (3) of outside the tank body is connected with biogas cloth air gas device. The lower part of biogas cloth air gas device is set with air gas distributing device. The air gas distributing device is connected with air inlet of outside the tank body. The lower part of biogas cloth air gas device is desulfurization liquid conduit. The inlet end of desulfurization liquid conduit with desulfurization liquid circulating pump is connected to desulfurization solution import and export. The desulfurization liquid circulating pump of outlet end is connected to desulfurization solution liquid distributor above fluidized filler area through desulfurization liquid circulation pipe. The upper part of tank is provided with a biogas outlet.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the fluidized-bed biogas biological desulfurization device.    Biogas gas inlet (3)    Biogas cloth air gas device (4)    Granular biological membrane attached filler layer (5)    Fluidized filler area (6)    Desulfurization liquid circulating pump (8)