The effects of centrifugation and membrane filtration on the components and clarification of ginseng extract were studied in this paper. First, plate centrifuges and high-speed tubular centrifuges were used for pretreatment, and then polypropylene microfiltration membranes with pore sizes of 10, 5, 1, 0.45, 0.22 and 0.1 μm were used for gradient filtration and clarification of ginseng extract.The pH value, soluble solids, density, turbidity, total ginsenosides and laser reflection were measured. After centrifugation and filtration with polypropylene membrane of 10～0.22 μm pore size, the pH value and soluble solid content of ginseng extract remained unchanged, while the indexes decreased after 0.1 μm membrane filtration. After centrifugation and filtration through a membrane with a pore size of 10～0.1 μm, the density and turbidity of the extract decreased gradually, the density and turbidity of the extract decreased gradually, and the total ginsenoside descended in stages and showed three different levels. It is feasible to use polypropylene membrane gradient filtration to clarify ginseng extract, and the optimum pore size of the membrane is 0.22 μm.