NOVELTY - Purifying beta-sitosterol and stigmasterol comprises (1) mixing plant sterols and n-amyl alcohol and then adding beta -sitosterol to form a saturated solution, filtering the solution to remove impurities to obtain a filtrate, cooling the filtrate, heating the filtrate and then filtering to form a crude beta -sitosterol filter cake, (2) incubating the resulting filtrate and then cooling, stirring, carrying out heat filtration and mixing with the filter cake to obtain crude sterols and (3) mixing the obtained product in step (2) with n-amyl alcohol and then heating to obtain a saturated solution.    USE - The method is useful for purifying beta-sitosterol and stigmasterol (claimed).    ADVANTAGE - The method enables purifying beta-sitosterol and stigmasterol in a simple manner with high purity and high yield and without pollution.    DETAILED DESCRIPTION - Purifying beta-sitosterol and stigmasterol comprises (1) mixing plant sterols and n-amyl alcohol at 60-70 degrees C and then adding beta -sitosterol to form a saturated solution, filtering the solution to remove impurities to obtain a filtrate, cooling the filtrate to 40 plus minus 2 degrees C, heating the filtrate for 2-12 hours and then filtering to form a crude beta -sitosterol filter cake, (2) incubating the resulting filtrate and then cooling to 20 plus minus 2 degrees C, stirring for 2-12 hours, carrying out heat filtration and mixing with the filter cake to obtain crude sterols, (3) mixing the obtained product in step (2) with n-amyl alcohol and then dissolving and then heating at 50 plus minus 10 degrees C to obtain a saturated solution containing stigmasterol, cooling the saturated solution to 20 plus minus 2 degrees C, stirring the solution for 2-12 hours, filtering to obtain crude stigmasterol filter cake, (4) mixing the obtained products in step (2) and (3) and then heating, concentrating at the ratio of 1/3-1/5 and then cooling to 0-10 degrees C, constant stirring for 2-12 hours and filtering to obtain beta -sitosterol filter cake, (5) adding stigmasterol crude product with n-pentanol at 60-70 degrees C and then filtering to remove impurities, cooling the obtained product at 0-10 degrees C, constant stirring for 2-12h, carrying out heat filtration for 1-2 times and then drying to obtain high purity stigmasterol products and (6) mixing the obtained product in step (1) and step (4) with n-pentanol at 60-70 degrees C, carrying out filtration to remove impurities and then cooling to 0-10 degrees C, constant stirring for 2-12 hours and filtering to obtain a filter cake for 2-3 times and then drying.