| Nowadays most fresh-keeping materials are functional plastic which may destroy the environment. So degradable fresh-keeping material is necessary for our life. This paper focuses on chitosan and chitosan -starch film that applied on fruits and vegetables fresh-keeping.Mechanical performance, permeability, antimicrobial performance and vapor permeability of the chitosan films in deferent were studied in this paper. And we found that the 2% is the most feat for the forming of chitosan films. Secondly the same performance of chitosan-starch blend films also were studied including the study for the stricture of these blend films using SEM and permeance, and when the proportion of chitosan and starch is 60/40,the performance of blend film is the best .all of these is the base of study for fresh-keeping.The different concentration's chitosan and the different proportion's chitosan-starch blends were applied for the filming fresh-keeping of Chinese goosebeery and winter-jujube. At fixed time the rigidity, weight loss, respiration and Vc contention of the two kind of fruits were measured .the result of study show that the best condition for keeping Chinese goosebeery fresh is under 4℃,the proportion of chitosan and starch II is 80/20. After 16 days, the four indexes are the best of all. Under the same condition, the same result was founded in study of winter-jujube.
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