Sweet potato, also known as sweet potato, sweet potato, sweet potato, sweet potato, scientific name sweet potato. Sweet potato is an important grain and industrial raw material crop in China. In recent years, the consumption structure of sweet potato has changed significantly, the proportion of feed has decreased, and the proportion of fresh food and processing has gradually increased. The National Crop Production Structure Adjustment Plan (2016-2020) proposes that the focus of potato crop adjustment is to expand the area, optimize the structure, process transformation, improve quality and efficiency. In order to make effective use of the local light and heat resources, and give full play to the advantages of fresh food and processing sweet potato in structural adjustment, stable grain increase, and conversion and value-added, the Ministry of Agriculture's potato expert guidance group National Agricultural Technology Extension Service Center formulated 2017 fresh food and Guidance on the production of sweet potato production technology. (1) Select good varieties and cultivate healthy seedlings. Excellent varieties are selected based on resource endowments, climatic conditions and planting uses. It was found that the infected virus disease was removed in time, and the seedlings were quarantined and quarantined. The southern potato area avoided the continuous use of the field potato seedlings to prevent the spread of sweet potato SPVD virus disease and leaf roller virus disease. Strengthen the management of seedbeds, cultivate healthy seedlings, and choose seed fields with no virus pollution to produce seed potatoes. (2) Reasonable close planting and adjustment of the planting system. According to local conditions, the reasonable planting density should be determined. Fresh sweet potato should pay attention to increase the rate of commercial potato. The fresh edible spring potato in the northern potato area can be planted late and densely planted, with a density of 3500-4000 mu; the edible summer potato can be planted early, planted in mid-June, and the density is 4000-4500. The southern part of the southern potato area is dominated by summer potatoes, and the south can be planted all year round. The density of planting is about 3000. Strengthening crop rotation, it can be rotated by water, or with crops such as peanuts, corn, wheat, millet, etc., to reduce pests and diseases and continuous cropping obstacles, increase production and increase efficiency. Starch uses sweet potato to promote large-scale planting, and the planting density can be appropriately reduced. (3) Strengthening the field management and optimizing the group structure. In the early stage after planting, the focus is on promoting growth, early emergence, and early closure of the ridge; the medium-term control of stems and leaves is prolonged, with emphasis on establishing a reasonable group structure. If necessary, chemical control can be carried out according to the growth of shoots and shoots in the upper part; The expansion of potato tubers is the key point. According to the actual situation, combined with the control of Wang, 100 grams of potassium dihydrogen phosphate can be added in the mu; in the later stage of growth, attention is paid to flood control and water accumulation in the field is excluded. Technical measures such as mulching cultivation can be used to promote the improvement of yield and efficiency in the potato areas in the north and the middle and lower reaches of the Yangtze River, with the cover being wet and not covered, and the cover being excellent or not. Covering the membrane is generally not recommended in arid and barren hilly areas. (4) Scientific fertilization to promote high and stable yield. Rational fertilization, adhering to the basic fertilizer, supplemented by topdressing, supplemented by organic fertilizer, supplemented by chemical fertilizers, supplemented by potassium fertilizer and supplemented by phosphate fertilizer. Before the ridge, the base fertilizer is applied according to the soil condition. When the soil total nitrogen content is less than 0.08% and the available nitrogen is lower than 20-30 mg/kg, the application of pure nitrogen is 5 kg-20 kg as the base fertilizer; the available nitrogen is higher than 80 mg/ When it is kilograms, it is not necessary to apply nitrogen fertilizer. When the available phosphorus content is less than 20 mg/kg, 5 kg of pure phosphorus is used as the base fertilizer; when it is higher than 50 mg, the phosphate fertilizer is not applied. When the available potassium content is less than 30 mg/kg, 20 kg of pure potassium is applied per mu; when the available potassium content is 30-100 mg/kg, 10-20 kg of pure potassium is applied per mu; if it exceeds 150 mg/kg, potassium fertilizer may not be applied.   (5) Prevention-oriented, comprehensive prevention and control of pests and diseases. For root rot, yam and other diseases without effective chemical control, it is necessary to use disease-resistant varieties and disease-free land for planting, strengthen planting prevention and control, and inhibit infection of pathogens. For black spot disease, use a strong seedling with a height of 25-30 cm. Before planting, soak the part of the base of the seedling about 10 cm in 50% carbendazim WP 500-800 times liquid or 50% methyl thiophanate. The wettable powder is 300 times-500 times and the liquid is controlled for 8-10 minutes. For underground pests, measures combining physical control and chemical control are used to prevent and control the products and increase the rate of commercial potatoes. For example, black light is set up in the field to trap adult worms, and high-efficiency and low-toxic chemical pesticides are used to prevent and control cockroaches and golden worms. Southern potato areas should take comprehensive measures to prevent ants from harming. 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