Onion skin color can be divided into yellow skin, red skin and white skin three kinds of yellow skin type onion dormancy long, resistant to storage. According to the shape can be divided into two kinds of oblate and convex round, generally flat circular resistant storage. The varieties with more water and spicy taste are poor in storage. Therefore, the onion used for storage is preferably yellow husk, flat round, low moisture content, spicy and thick, onion bulbs with fine bulb neck. The storage onion is preferably harvested when the lowest one or two leaves are dry and the ground part begins to fall down. After harvesting, air dry and arrange the onions obliquely so that each row of stems and leaves just covers the onion on the front row so as to avoid direct sunlight on the onions. Turn it from 2 to 3 days and keep it until the leaves turn yellow. It takes about 4 to 6 days. The onion leaves were then braided to a length of about 1 meter, and the two “dumplings†were tied together to form a hanging, each hanging about 60 onions. It is also advisable to prepare the “dumplings†by drying them for 5 to 6 days, drying them on the onions, and drying them completely. If it is exposed to rain during the drying process, it will be difficult to dry and perish. The treated onion should be stored immediately, usually hanging under the eaves or indoors. Hanging rooms require good ventilation and are kept dry. It can also be used as a pile-up method, that is, in high-lying, well-drained areas, with straw or wheat straw mats, and then two layers of mats, and then the onion is hung up to 1.5 meters. Cover the roof with 3 to 4 floors, surround with a mat, and use a rope to fasten it horizontally and vertically to avoid direct sunlight or rain water infiltration. Onion leaves can also be removed and stored on the shelf. It is perishable in the early period of storage and easy to sprout in the late stage. Drying prevents rot. Two to three weeks prior to harvesting, spraying with 0.25% neomycin solution can inhibit shoot sprouting and can also be rooted with 0.25% fresh algae after harvest.