NOVELTY - Dry land sweet potato cultural method comprises:(i) mixing stable manure and smashed crops straw to make a structure, paving the structure, spreading the human wastes and adding the river sand, watering and planting the sweet potato, spraying fungicide and covering; (ii) spreading the fertilizer on flattened field and plowing, smoothing the row and spreading potash fertilizer and covering with soil; (iii) boring holes on the thin film to cultivate the plant seed, watering and sealing the plant seed with the soil, examining and mending the plant seed, weeding and harvesting.    USE - The method is useful for cultivating dry land sweet potatoes.    ADVANTAGE - The method has high rate of germination, able to maintain the moisture of the soil, low labor intensity and high production.    DETAILED DESCRIPTION - Dry land sweet potato cultural method comprises: (i) mixing a stable manure and a smashed crops straw uniformly in a proportion of 1:3-4 in the late March to make a structure, paving the structure on the seeding bed with a height of 30-50 cm, compressing and spreading the human wastes according to a proportion of 25-30 kg/m2, and then adding river sand to a height of 8-12 cm, watering on the river sand in a proportion of 20-25 kg/m2, planting the sweet potato seed uniformly on the river sand, spraying Derosal (RTM: Carbendazim) aerosol for disinfecting, covering the sweet potato seed with river sand with a height of 6-8 cm, watering in a proportion of 8-110 kg/m2, covering the seeding bed with plastic thin film and controlling the temperature at 29-32?0C before budding and 25-28?0C after budding, where the sweet potato grows to 20-30 cm height; (ii) flatting the field, spreading the farm fertilizer of 1300-1500 kilograms/ mu and plowing, flatting the field after raining in the later March, rowing to make the rows with a row distance as 50-60 cm, smoothing the row and spreading potash fertilizer and covering with soil to a height of 10-15 cm, flatting again and covering with a thin film; (iii) boring holes on the thin film having a diameter of 0.8-1.2cm and depth 10-12 cm to cultivate the plant seed, with a row spacing of 30-33 cm, watering and sealing the plant seed with the soil, examining and mending the plant seed, weeding and harvesting in the later April to the early May.