The invention relates to a cultivation method for increasing the saponin content of notoginseng root tubers and belongs to the technical field of modern Chinese herbal medicine cultivation. The cultivation method for increasing the saponin content of the notoginseng root tubers comprises the six steps of land selection, land preparation, seedling screening and disinfection, transplanting, field management and harvesting. The cultivation method is mainly characterized in that before the late growth stage of two-year-old notoginseng and excavation of three-year-old notoginseng, sunshade nets and other mantles of a notoginseng planting garden are peeled off, and accumulation of saponin at the roots of notoginseng plants is promoted through perpendicular sunlight incidence in the notoginseng planting garden. The cultivation method is simple in operation, easy to master and suitable for popularization, and therefore the medicinal component content of notoginseng can be increased.