| A laboratory analysis was carried on the physiological characteristics of Cucumis melo Cv Hetau, which was collected at Dengkou, Hetau. The objectives were to find out the relationship between the quality of Cucumis melo and its collecting time and storage conditions. Its nutrients, amylase, CAT, POD, ethylene, and fruit gum were analysed and results showed that:1. During the process of development, maturation and senility, its titratetable acid, vitamin C, soluble carbon-hydrates, reducing sugar, cane-sugar, and TSS could be characterised into three stages: (1) gradually accumulating period, 20 - 34 days after fruiting; (2) rapid accumulating period, 34 -41 days after fruiting; and (3) losing period after collecting, it was collected at 41 days after flowing.2. Suggested collecting time should be about 36 days after fruiting just before soluble carbon-hydrates, ethylene and respiration rate reach the peek value. This is because the quality of Cucumis melo is good enough at that time and the most important is being easy to transport and store.3. Cucumis melo is a typical fruit with a leap change in respiration.Ethylene reaches the first peek at 27 days after fruiting, which help enhancing the development of fruit. The second peak occurs at 7 days after collecting, meanwhile the fruit star decomposing. This suggests that ethylene play a very important role in the process of maturation and senility.4. An effective way, lower temperature storage, to postpone the appearance of peak time of respiration was found, which in turn extents the storage period by 9 days. That is because storing at a temperature of 6 ℃ compared with air temperature of 20 ℃ could postpone the peak time by 3 days.
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