1. cellar location should be selected in the higher terrain, soil quality to red loam-based places. The depth of the cellar to 3 meters or so appropriate, sweet potato two storage hole height of not less than 1.8 meters, length and width of not less than 2.5 meters, such a cellar can be stored fresh sweet potatoes about 4000 kilograms.

2. Before the sweet potatoes into the cellar, the old cellar hole should be dug again to see the new soil shall prevail, the old soil out of the cellar. If the cellar is dry, you can throw a few buckets of water to keep the cellar moist. Before storing sweet potatoes, the cellar should be evenly sprayed with 50% carbendazim wettable powder 1500 times liquid or 50% sulfur suspension 800 times liquid to achieve the purpose of sterilization.

3. Storage should try to choose no germs infestation, no pests and diseases of sweet potatoes, handling into the cellar should be light, pay attention to not damage the sweet potato skin. Each storage of about 150 kilograms of sweet potatoes, with "sweet potato freshness agent" diluted solution evenly sprayed once. 4. sweet potatoes according to the size of the hierarchical stacking to facilitate the pouring of the cellar, the height of sweet potatoes piled up from the top of the hole 60 cm or so appropriate, in order to facilitate the sweet potatoes to breathe and heat dissipation. With the above method of storage of sweet potatoes, freshness time up to more than 8 months, sweet potato intact rate of up to 96%.