短梗霉多糖具有极佳的成膜性，其水溶液可以在水果表面形成一层透明有光泽的薄膜。该薄膜对氧气、氮气、二氧化碳、永分和有关香气有很好的阻隔作用，而且有较强的硬度及对温度变化的稳定性。因此，在水果表面挂上短梗霉多糖薄膜后，能有效地阻止水分、氧、氮、和二氧化碳等气体在果品内外的交换，从而抑制了水果的呼吸作用，减少了营养的储藏性损耗，进而达到了良好的保鲜目的。 Pullulan polysaccharide has excellent film-forming properties, the aqueous solution can form a layer of transparent and shiny film on the surface of the fruit. The film on oxygen, nitrogen, carbon dioxide, Yong points and related aroma has a good barrier, but also has a strong hardness and temperature stability. Therefore, attaching the pullulan film on the surface of fruit can effectively prevent the exchanging of moisture, oxygen, nitrogen, carbon dioxide and other gases inside and outside the fruit, thereby inhibiting the respiration of fruit and reducing the storage loss of nutrition, And then reached a good purpose of preservation.