The invention relates to an HPLC method for detecting saponin in panax notoginseng leaves, and belongs to the technical field of medicine. The method comprises the following steps of: preparing a testsample solution, preparing a reference substance solution, determining chromatographic conditions, measuring chromatographic peaks, and the like. The HPLC method can accurately measure the contents of seven saponin monomers, including ginsenosides Rb1, Rc, Rb2 and Rb3, notoginsenosides Fa and Fe and gypenoside XVII in panax notoginseng leaves in a short time, meets the related standards of Pharmacopoeia of People's Republic of China in precision, stability, repeatability, minimum detection limit and sample recovery rate, and is rapid, simple, stable and reliable and easy to popularize and apply.