研究了龙眼经生物保鲜膜、PE膜包装后 ,在低温 (3℃ )下 60d的贮藏效果和保鲜机理 .结果表明 :经该膜保鲜后的龙眼 ,其好果率 (88.89% )、失重率 (2 .0 3% )、褐变率均优于未经处理的 ,呼吸强度及营养成分变化也低于未经处理的 ,基本上防止了果皮失水、褐变 ,果肉长霉、腐烂变质 ,保持了龙眼的原有品质 ,延长了保鲜期和货架寿命 . The storage and preservation mechanism of longan after being preserved in biofilm and PE membrane for 60 days at low temperature (3 ℃) were studied.The results showed that the good fruit rate (88.89%) and weight loss rate (2 .0 3%), browning rate were better than untreated, respiratory intensity and nutrient content changes are also lower than untreated, basically preventing the pericarp water, browning, flesh growth and decay , To maintain the original quality of longan, extended shelf life and shelf life.