Abstract: In order to study the effects of different concentrations of methyl jasmonate（MeJA） treatments on the qualities of postharvest apricot fruits, the hardness, rot indices, total soluble solids（TSS） and titratable acid（TA）contents, and the activities of polyphenol oxidase（PPO）, catalase（CAT） and peuroxidase（POD） were measured after 0,10,100 μmol/L MeJA treatments. The results showed that MeJA treatments could improve the CAT activities of apricots, while inhibit the POD and PPO activities, reduce the fruit rots, delay the softening rates, and improve the flavors and qualities of fruits without significant effects on TSS contents. Besides, 10 μmol/L of MeJA presented the best preservation effects of on postharvest apricots.