Protein dialysis ultrafiltration system

The utility model discloses a protein dialysis ultrafiltration system which comprises a control system, a dialysis tank; the main output pipe is sequentially connected with a main output valve, an electric diaphragm pump and a first pressure sensor; the main return pipe is sequentially connected with a second pressure sensor and a return valve; a third pressure sensor, an electrical conductivity detector and an exudation valve are sequentially connected to the main exudation pipe; and each stage of dialysis mechanism is provided with an ultrafiltration membrane bag, a feeding branch pipe, a backflow branch pipe and a material permeation branch pipe. According to the protein dialysis ultrafiltration system, dialysis operation can be carried out on proteins with different molecular sizes, multiple devices do not need to be purchased or disassembled repeatedly in the using process, damage to the ultrafiltration membrane is reduced, the purchasing cost and the using cost are reduced, and the production efficiency