Three terpene compounds contain about 30 carbon atoms, whose basic framework is multiple isoprene. It has a wide range of sources and high medicinal value, and has been used as an important chemical component in medicines. This paper discussed the research progress on antitumor effect of oleanolic acid, betulinic acid and ginsenoside Rh2, Rg3 in three terpenoids. The antitumor mechanism of three terpenoids and the selectivity and specificity of different triterpenoids were summarized. It has important ...