The invention discloses a method for controlling the crown growth of a peach tree by using inter stocks, which comprises the following steps: A, selecting and cultivating stock seedlings; B, selecting inter stocks; C, grafting and managing the inter stocks; D, grafting and managing cultivars; E, carrying out field planting and orchard establishing: the field planting is performed according to the requirements for orchard establishing of mature or young peach seedlings, and when planting, the lower graft union of the inter stock is exposed above ground; and F, carrying out final-period management: if the cultivated inter stock seedlings are mature seedlings, trunk cutting is carried out directly according the requirements for peach cultivation, and if the inter stock seedlings are young seedlings, the pinching and trunk cutting are carried out after the germination of scion buds; offshoots on rootstocks and the inter stocks are removed timely, and other fertilizer managements and insect and disease controls are same as those after a peach seeding orchard is established. The method of the invention is simple and easy to perform and convenient to operate, promotes the formation of blossom buds on the branches of the peach tree, improves the fruit-setting rate and the fruit quality of the peach tree, solves the key technical problem of controlling the crown growth of the peach tree, and overcomes the defects caused by usually using chemical inhibitors.