The invention relates to a method for extracting
steroid saponin from
Chinese lantern-
plant stems and persistent calyx, relating to a
drug extracting method, which comprises the following steps of crushing dried
Chinese lantern-
plant stems and persistent calyx, then extracting for 1-5 times and 5-15 min with the
microwave radiation power of 380-680 W and 60-90%
ethanol, wherein the material-to-
liquid ratio is 1:10 to 1:40; after extracting, filtering, extracting, mixing extraction solutions to prepare an extract; after the extract is dissolved, measuring through a vanillic
aldehyde-
perchloric acid colorimetric method based on dioscin as the standard substance to calculate the content of
saponin in the extract. By means of the
microwave extraction method, the extraction time can be obviously shortened; the yield of
steroid saponin is increased; the medicinal and edible dual-purpose resources of
steroid saponin in the
Chinese lantern-
plant stems can be sufficiently utilized; in addition, after being separated and purified, steroid saponin in Chinese
lantern-plant stems and persistent calyx extracted through the method disclosed by the invention can be used for preparing the drugs, such as antibacterial drugs,
expectorant drugs, antiplatelet drugs, lipid-lowering drugs and anti-tumour drugs, or used as the
raw material of functional foods and health-care foods.