Abstract: The effects of Allium macrostemon Bunge extracts on the fresh-keeping of Toona sinensis were studied by determinating the vitamin C,chlorophyll and the appearance changes. The results showed that the extracts of Allium macrostemon Bunge has significant effect on the preservation of Toona sinensis. It can prolong the fresh keeping time of Toona sinensis for over 7 days.The Allium macrostemon Bunge’s water extracts can decrease the rot rate and inhibit the loss of Vc in Toona sinensis, after 28 days, the intact rate is 89.6%, Vc preservation rate is 49.4%. When mixed with 6-BA, the ethanol extracts of Allium macrostemon Bunge can effectively reduce the defoliation rate as well as the rate of weight loss, delay chlorophyll degradation, after 28 days, the defoliation rate of Toona sinensis is20.3%, the weight and the chlorophyll loss rate is respectively 3.8% and 5.3%. The extracts of Allium macrostemon Bunge have the potential of being developed into natural vegetable preservatives.