The invention belongs to the technical field of biomedicine, and provides a bioartificial liver system. The system comprises a plasma separation / retransformation circulation part and a biological liver circulation part. The two parts are connected with each other through a circulation pipeline. The biological liver circulation part comprises a constant-temperature box with a heat preservation effect, a double-cavity blood storage bag, an oxygenation column, a plasma circulating pump, a dissolved oxygen monitoring and temperature instrument and a flow guide type micro capsule suspended fluidized bed bioreactor, wherein the double-cavity blood storage bag, the oxygenation column, the plasma circulating pump, the dissolved oxygen monitoring and temperature instrument and the flow guide type micro capsule suspended fluidized bed bioreactor are sequentially connected to form a circulating system. By means of a turbine flow guide type inlet, flow distribution is carried out on a part of high-speed fluid of the inlet by the bioreactor, lateral shear force borne by micro capsules in a fluid force field is effectively reduced, damage to the micro capsules is reduced, and contact efficiency of cells cultured in the bioreactor and perfusate is improved. The bioreactor is used for bioartificial liver supportive treatment system in order to obtain more ideal effects on the aspects of treating serious hepatitis, hepatic insufficiency and other diseases.