Centrifuging lifting stirrer of bioreactor

A centrifuging lifting stirrer of a bioreactor comprises a tubular central shaft, wherein a defoaming barrel is fixedly arranged on the periphery of the lower part of the central shaft; a vent pipe is arranged at the lower end of the central shaft in a downwards-extending manner; a lifting pipe is arranged below the central shaft and on the outer side of the vent pipe; a centrifuging blade assembly is arranged between the central shaft and the lifting pipe; a ventilating barrel is arranged on the outer side of the lifting pipe; an air distributing screen mesh is arranged inside the barrel wall of the ventilating barrel; the lower end of the vent pipe is communicated with the inner cavity of the ventilating barrel through a connecting pipe; the upper part of the ventilating barrel is communicated with the defoaming barrel through an exhaust pipe. The centrifuging blades are arranged inside the stirrer, so that the culture solution lifting capacity is increased, thereby improving the mixing capacity for microcarrier and flaky carrier cell culture and improving the transfer capacity of nutrients and oxygen of a culture solution; when the stirrer is applied to a flaky carrier packed bed reactor, the centrifuging and lifting stirrer becomes an effective culture solution lifting and mixing device because the culture solution does not contain free cells basically.