目的 为应对传统塑料包装引起的“白色污染”问题，并提升食品品质和安全性，开发绿色环保且具有可降解性的包装材料已成为当前研究的热点。多糖类可食膜因其绿色、安全且可降解的特性，被视为理想的替代方案。方法 阐述多糖类可食膜的概念、特性、种类及常用的添加剂，并归纳总结其在果蔬、肉类和水产品等食品领域中保鲜作用的具体应用实例。结果 目前多糖类可食膜经深入研究与实践探索，已发展为一种制备工艺成熟、应用前景广阔的食品包装材料，在食品保鲜、延长货架期等方面展现出独特优势。大量研究表明，通过优化制备工艺和添加功能性成分，可以显著提高膜的性能。结论 这些研究方向将为多糖类可食膜提供理论基础，并推动其在食品包装领域的应用不断拓展。

In order to address the "white pollution" caused by traditional plastic packaging and enhance the food quality and safety, the development of environmentally friendly and biodegradable packaging materials has become a hot topic in current research. Polysaccharide edible films are regarded as an ideal alternative because of their green, safe and degradable characteristics. The concepts, properties, types, and commonly used additives of polysaccharide edible films were elaborated, and the specific application examples of these films in the preservation of fruits and vegetables, meat, and aquatic products within the food industry were summarized. Currently, after extensive research and practical exploration, polysaccharide edible films have evolved into a maturely prepared and widely applicable food packaging material and have demonstrated unique advantages in food preservation and shelf-life extension. A large number of studies have shown that the film performance can be significantly improved by optimizing the preparation process and adding functional components. These research directions will provide a theoretical basis for polysaccharide edible film and promote its application in the field of food packaging.