In order to reduce the axial backmixing and increase the throughout flux in the agitated extraction column, the column was modified on the basis of the agitated sieve plate extraction column, and a new agitated extraction column with relatively light backmixing is proposed. Through the simulation of residence time distribution, combined with backmixing model and flow field analysis, the effects of annulus area, annulus position, opening mode, and the height of settling compartments on fluid flow characteristics are studied. The results show that the inter-stage rotating baffles can effectively inhibit axial backmixing in the column, and the larger the diameter of baffles, that is the narrower the annulus in the column, the smaller the backmixing. The optimum diameter of the inter-stage baffles in the agitated extraction column with a diameter of 50 mm should be more than 25 mm, that is, the ratio of the annulus area to the cross-sectional area of the column should not exceed 25%. Under a certain annulus width, the annulus position has little influence on the fluid flow. When the diameter of the inter-stage baffles is roughly equal to the impellers', the backmixing in the column reaches the smallest. Different opening modes also affect the flow characteristic in the column. Both perforated stators and perforated inter-stage baffles increase backmixing, especially the perforated inter-stage baffles just below the impellers. Under the condition of a certain annulus area, the agitated extraction column A6 without pores in stators and inter-stage baffles has the smallest backmixing and its structure is simple. However, if the liquid-liquid dispersion and the dead zone of the light phase are taken into consideration, the agitated extraction column B3 and B4 not only have relatively low backmixing, but also could improve the throughout flux, whose performance can be further studied. The settling compartments can reduce the backmixing, and the higher the height of settling compartments, the smaller the backmixing. Considering the equipment cost in practical application, the optimum ratio of the height of settling compartment to column diameter should be about 0.7.