| This paper's main objective was improved the storage life of Xinjiang Hami melon. The bacteria were separated and antistaling mechanism on Xinjiang Hami melon was studied using chitosan. The effect of preservation of Xinjiang Hami melon treated with chitosan film was studied. The main results of this paper are as follows:It was separated and determined from the rotten Hami melon skin that the infection rotten mold mainly is alternaria and penicillium. Citric acid and acetic acid were ideal solvent, its were cooperated with chitosan. The growth and breeding of bacteria can be suppressed effectively by use of the chitosan solution.The Hami melon was stored at constant temperature (23℃~30℃) and low temperature (3~5℃), at the same temperature, the melon was treated with and without the film respectively. The weightlessness rate, decay rate, breath intensity, fruit pulp degree of hardness, soluble solid line of content, return to original state sugar content, Vc content, total acidity, pH value,ethyl alcohol, total pectin and water-soluble pectin content , relatively electrical conductivity, polyphenoloxidase (PPO) and peroxide enzymic(POD) activity was determined during the storage. The test result indicates: The quality of Hami melon that was treated with chitosan film was better than that of no treated , and the storage time was relatively longer.The effect was proofed by the experiment, it can draw a conclusion that the Hami melon using the chitosan film can separate the deleterious microorganisms, reduce the decay rate, lengthen storage time. So it has considerable feasibility to post-harvest commercial treatment.
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