The invention discloses a cultivation method of interplanting of horse chestnut and rivier giantarum rhizome. The method comprises the steps that amorphophallus konjac varies which are locally planted for several years, can be better suitable for the local ecological condition and are good in disease resistance are selected, suitable horse chestnut woodland is selected, through a series of technical measures such as sowing at the right time, disinfection treatment of rivier giantarum rhizome seeds, scientific fertilization, comprehensive control of diseases and pests, and digging and harvesting through classification, advantages of the horse chestnut woodland are sufficiently developed, diseases and pests are lowered, and high yield and economic benefit are furthest obtained. Compared with the prior art, the rivier giantarum rhizome is planted under the horse chestnut, the horse chestnut can sufficiently use fertilizer and pesticide for planting the rivier giantarum rhizome again, the input of the fertilizer and pesticide is reduced, meanwhile, weeding is not needed, and the labor input is lowered; the horse chestnut creates the growth environment suitable for the rivier giantarum rhizome, the diseases of the rivier giantarum rhizome are reduced, the yield is improved, and the income is increased.