The utility model relates to a device for treating dried tail gas of a drying system in the biopharmaceutical industry. The utility model is characterized in that the device is formed by combining a dedusting system, a dehumidifying system and a heating system sequentially through pipelines, wherein the dedusting system comprises a sealed box body; an air inlet is formed on the side surface of the box body; a lift valve system is arranged at the top of the box body; an air purifying chamber and a pulse blowing system are arranged below the lift valve system; a filter bag is arranged below the pulse blowing system; an ash bucket is arranged below the filter bag; a feed port is formed at the lower part of the ash bucket; the dehumidifying system comprises a condenser box body and a silk screen demister connected with the condenser box body; and a drafting system centrifugal fan is arranged behind the silk screen demister. The utility model integrates high-efficiency dust removal, condensing dehumidification and heating recycling organically, and solves the technical problems of secondary pollution, high operating cost and incomplete treatment in other treatment methods due to adoption of circulative reclamation.