Composition containing total triterpenoid saponins extracted from bamboo, and the preparation method and use thereof

A method for extracting total triterpenoid sapogenins from bamboo comprising the steps of:

• (a) mixing the material with the supercritical CO2 fluid, thereby making the low-polar substances of bamboo such as free triterpenoids dissolve in CO2 fluid, wherein the material is selected from the group consisting of poles, branches, leaves, shoots, shoot sheaths and roots of bamboo in Gramineae family or their mixture, and the extraction temperature is 50-65° C. and the pressure is 25-35 Mpa;
• (b) changing the pressure of CO2 fluid containing free triterpenoids to gasify CO2, and separating the total triterpenoid sapogenins, wherein the separation temperature is 35-45° C. and the pressure is 5-10 Mpa.

A use of total triterpenoid sapogenins extracted from bamboo, wherein the pentacyclic triterpenoid sapogenins from the total triterpenoid sapogenins are used to prepare a medicine or functional food for preventing or treating cardiovascular and cerebrovascular diseases and carcinoma, or to prepare cosmetics.