The utility model relates to a gaseous processing technique aims at providing a cellular VOCs of fixed bed formula adsorbs desorption apparatus. The device is including piling the adsorption bed unit of having filled out adsorption material, and the adsorption bed unit has a plurality of and parallelly connected installation, constitutes the adsorption bed module, the adsorption bed unit has outer frame, and insulated lining is established to its inner wall, inlet channel is connected respectively to the inlet end of every adsorption bed unit, and the exhaust passageway is then connected respectively to the exhaust end, inlet channel connects hot -air and exhaust gas supply line way and realizes admitting air the switching, and exhaust passage connection purified gas and desorption trachea are said and is switched with the realization exhaust, establish gas concentration detection apparatus on the purified gas pipeline to the passing signal line connects to PLC the control unit. The utility model discloses in each adsorption bed unit be in absorption, desorption, the refrigerated state of rotating in proper order, the adsorption bed unit is in continuous update mode, need not to rotate the adsorption bed unit, energy -conservation subtracts bad news. Each adsorption bed unit is relatively independent, and the specification is unified, be convenient for production and dismouting, and regeneration is convenient.