The utility model discloses a carbon fibre precursor polymerization continuous feeding system belongs to carbon fiber production technical field. This system includes the dimethyl sulfoxide storage tank, acrylonitrile storage tank, monomer storage tank, initiating agent storage tank, pump, mass flow meter, governing valve, static mixer and mixed liquid storage tank. The dimethyl sulfoxide storage tank, the acrylonitrile storage tank, a plurality of monomer storage tanks, the initiating agent storage tank is connected with the pump alone through independent pipeline. Every pump is connected with mass flow meter and governing valve respectively in proper order. Every communicates with static mixer with the pipeline that the governing valve is connected. Static mixer passes through the pipeline and mixes liquid storage tank intercommunication. This system adopts each raw materials storage tank to be connected with the pump respectively, connects mass flow meter and governing valve again on the pipeline in proper order respectively, and the feeding volume of independent each storage tank of accurate control can realize the real -time supply in succession of raw materialss that different prescriptions form. Simultaneously, owing to can carry out serialization production, giving birth to tea efficiency and improving by a wide margin, product quality is stable.