| Cucumis melo L.cv Hetao is a kind of fruit that has respiratory climacteric, it ripens very fast and its ripening time assemblies in July and August which are the most hot months with much rain, so it's very difficult to be preserved and transported. So it has become an urgent problem to work out a safe and effective method for storage. Ozone is an agent with high oxidizing ability, it can oxidize pathogenic bacteria, decompose ethylene gases. Based on the characters of ozone, different concentration of ozone gases was used to store Cucumis melo L.cv Hetao according to the regional storage condition, and the effect of ozone treatment on postharvest physiology and quality and decaying of Cucumis melo L.cv Hetao was researched, ozone concentration under different temperature and the best combination of ozone concentration and storage temperature were determined. The results showed that postharvest physiology was controlled and the velocity of metabolism slowed, declination of quality was obviously improved, decay of Cucumis melo L.cv Hetao was put off and the extent is abated compared to the untreated fruits. Under different temperature, proper ozone concentration are 15℃,50 μl ·l-1·d-1, 10℃,50～100 μl ·l-1·d-1, 5℃,50～100 μl ·l-1·d-1, the best combination of ozone concentration and temperature is 100 μl ·l-1·d-1, 5℃.
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