Abstract: 【Objective】 To investigate the effects of different precooling methods combined with hydrogen peroxide (H₂O₂) fumigation on postharvest storage and fresh-keeping of prune. 【Methods】 The Dongfeng Farm prune of Xinjiang 3rd Division was used as the test material. The prunes were stored at 1℃ and the humidity was 85%-90%. The physiological indexes of prunes were measured regularly. The prunes were stored at 1℃ and stored in a fresh storage room with no precooling or fumigation as control (CK). The quality changes of prune during storage were analyzed. 【Results】 Compared with the control group, the three precooling methods combined with 3%H₂O₂ fumigation treatment effectively maintained the storage quality of prune to a certain extent. Comparison of storage quality and fresh-keeping effect of prune in different treatment groups: In-situ differential pressure pre-cooling treatment group > pre-storage turnover box treatment group > cold storagedirect cooling treatment group > CK.Among them, the respiratory intensity of the in-situ differential pressurepre-cooling treatment group was delayed by 30 days compared with the CK group, and the pre-storage coldturnover box and cold storage direct cooling were delayed by 15 days compared with the CK group. On the 90th day, the fruit decay rates of the cold storage turnover box, in-situ pressure difference, and cold storage directcooling treatment groups were 61.2 %, 40.8 %, and 51 % of the CK group, respectively, and the hardness was17.65 %, 70.6 %, and 5.9 % higher than that of the CK group, respectively. The in-situ differential pressurepre-cooling treatment group better inhibited the decay rate, weight loss rate, hardness, soluble solids, titratableacid and VC content of the plum, increased the activity of SOD, CAT and POD, prevented the softening of theplum, and maximized the storage quality of the plum. 【Conclusion】 Postharvest pre-cooling combined with H₂O₂ fumigation treatment has a positive effect on delaying the senescence process of prunes and maintainingbetter storage quality. In particular, tunnel in-situ differential pressure pre-cooling combined with H₂O₂fumigation treatment has the best effect on maintaining postharvest preservation of prunes.