Polypropylene tail gas recovery unit uses the pressure of tail gas itself to gradually reduce its gas to low temperature, most of the olefin components are liquefied, and then after gas-liquid separation, the product olefin is reheated and returned to the reactor for recycling. After separation, the olefin content in tail gas is very low (鈮?2%), so it can be returned to the degassing bin for recycling. The utility model is characterized in that the polypropylene tail gas recovery device is mainly composed of a reaction furnace at the bottom end, an exhaust fan on the reaction furnace, a recovery layer on the exhaust fan, an air exchange fan on the recovery layer and an air outlet on the air exchange fan, The cost is saved, the waste is avoided, a large amount of tail gas is avoided to be discharged into the air, and the environment is protected.Polyolefin Tail Gas Recovery Plant manufacturers website:http://www.cryoseparation.com/chemical-off-gas-recovery-plant/polyolefin-tail-gas-recovery-plant/