The invention discloses a high-yield cultivation method for sweet potatoes. The high-yield cultivation method comprises the following concrete steps: I, choosing an improved variety: the improved variety is the key to produce the sweet potatoes at high yield; according to the use and the sale, the improved variety is chosen in the light of local conditions, and especially, the new variety is particularly obvious in yield-increasing effect; II, cultivating strong seedlings: the roots of the strong seedlings are numerous and developed, after being planted, the seedlings survive quickly, and hair roots bear the sweet potatoes fruitfully, which lay the foundation for full stands, strong plants, numerous potatoes and big potatoes; the standards of the strong seedlings are shown as follows: thick and strong stems, short internodes, fat blades and moderate sizes, with the features of the improved variety, no diseases, plenty latex of cuts, 50cm to 70cm of vine length and more than 0.5cm of stem thickness; III, transplanting in real time; IV, performing scientific management; V, harvesting the sweet potatoes when potato leaves start to turn yellow and the air temperature is below 20 DEG C, wherein the sweet potatoes require to be harvested before the end of October, and potato tubers should be prevented from being damaged by digging during harvesting. The high-yield cultivation method disclosed by the invention has the advantages that seeds are saved by more than 1 / 3, the buried section number of seedling vines is large, covering of soil is slight, the soil temperature is high, and after ventilation, the survival rate is high.