“Xi zhou mi 25” hami melon as test material. There were total four treatments:melon were not treated was CK,melon were soaked in 55 ℃hot water for 3 minutes,melon were coated processing by 2%of chitosan,melon were treated by heat treatment+chitosan processing (referred to as combination treatment),the melons were storaged at 3℃-5℃, the decay rate, respiration, ethylene production and disease resistance activities were researched. The results showed that: the decay rate ,respiration, ethylene production were reduced significantly and peroxidase(POD), phenylalanine ammonia lyase(PAL),β-1, 3-glucanase(GLU) and chitinase (CHT) activities were improved by combination treatment The stability of the film was protected.%以“西州蜜25号”哈密瓜为试验材料，试验设计四个处理：不经任何处理（CK）、55℃热水浸泡3 min、2%壳聚糖涂膜处理、55℃热水浸泡3 min+2%壳聚糖涂膜处理（简称结合处理）；放置3℃～5℃冷库中贮藏，对哈密瓜在冷藏中腐烂率、呼吸强度、乙烯释放量及抗病性酶活性等进行研究。研究结果表明：结合处理可明显降低腐烂率，抑制呼吸强度上升，减少乙烯释放量，提高过氧化物酶（POD）、苯丙胺酸解氨酶（PAL）、β-1，3-葡聚糖酶（GLU）、几丁质酶（CHT）的活性，对保护膜的稳定性效果较好。
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