(PJ) have the similar chemical composition and pharmacologic effects but different applications based on the TCM theory. PG is renowned for its qi-tonifying properties, while PQ is known for its heat-clearing and fluid-nourishing effects. PJ can eliminate phlegm and relieve cough except for its stasis-dispelling and hemostatic properties like PN. PN, PG, and PQ feature damarane-type saponins, while PJ has a high content of oleic acid-type saponins. In this review, the saponins within the four species were classified and compared, and the unique saponins in PN were identified, such as notoginsenosides Ft1, B, Ab1-3, Fh1-9, etc., which may contribute to its special activities. And their pharmacological effects were also analyzed and summarized, suggesting that notoginsenoside Ft1 may be crucial for vascular homeostasis. However, the effect of unique saponins in PN on blood health should be well-clarified. This review highlights the importance of unique saponins in PN for its overall efficacy and hopes to make further exploration of their potential applications.