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Allium tuberosum Roxb is very popular for its function of stomach-strengthening, spirit-freshening, yang-warming and kidney essence-replenishing, however, its seeds appear to low bud, irregular sapling and other side effects, which result in low yield and poor quality. This paper analyzed effects of PEG6000 concentration on budding percentage in detail. It comes to conclusions that budding percentage of No. 1 seed increases from 71% to 92% on the basis of 36 h treatment by 20% PEG6000 and 24 h water-drying, that of No. 3 seed ranges from 30.4% to 53.4% on the basis of the same treatment by 10% PEG6000.