目的 综述聚乳酸(PLA)、聚乙交酯(PGA)、聚乙丙交酯(PLGA)及其改性材料在包装领域的研究进展，对改性材料及制备工艺进行展望，为PLA、PGA以及PLGA的改性与制备提供参考。方法 简介PLA、PGA以及PLGA的制备方法、基本性能，并总结近几年改性材料的种类及其制备工艺。结果 对PLA、PGA以及PLGA进行改性，再通过溶液铸膜、吹塑制膜等工艺制备薄膜，制备的薄膜具有优异的抗紫外性能、阻隔性能以及抗菌性能。结论 PLA、PGA以及PLGA具有优异的生物降解性能，通过改性后制备的薄膜性能更加均衡，在包装领域具有极大的应用前景，对聚合物的改性方法还需进行深入研究，制备出性能更加优异的改性材料。

The work aims to introduce the research progress of PLA, PGA and PLGA in packaging, to provide an outlook on the modified materials and preparation process, and to provide a reference for modification and preparation of PLA, PGA and PLGA. The preparation methods and basic properties of PLA, PGA and PLGA were introduced. The types of modified materials and their preparation processes in recent years were summarized. PLA, PGA and PLGA were modified, then the composite films were prepared with excellent UV resistance, barrier properties and antibacterial properties by solution casting and blown film making processes. PLA, PGA and PLGA have excellent biodegradable properties, and the films prepared by modification have more balanced properties, which have great prospects for application in packaging. In-depth research on polymer modification materials and methods is still needed to prepare composites with better performance.