食品包装在保持食品质量和延长货架寿命方面起着关键作用。然而，传统的塑料包装存在环境污染和可持续性问题，因此，寻找可持续、环保的替代材料已成为当前研究的热点。与单层生物基膜相比，多层生物基薄膜表现出更好的机械性能、阻隔性等，由于多层包装材料在各层之间有更为复杂的内部结构和更大的层间空间使其更合适活性物质的引入，因此近年来引起了广泛的关注和研究。该文综述了多层生物基薄膜的构建方法及其在包装食品领域中的应用。讨论了生物基包装材料的分类，对多层生物基薄膜的制备方法包括层层自组装技术（LbL）、电流体力学方法、共挤压方法和溶剂浇铸法的制备过程及其优缺点进行介绍，通过近年来对多层生物基包装在食品领域的研究进展进行综合分析和总结，提出了生物基多层薄膜未来的研究方向和发展趋势。

Food packaging plays a key role in maintaining food quality and extending shelf life. However, the traditional plastic packaging has environmental pollution and sustainability problems, so seeking sustainable and environmentally friendly alternative materials has become a hot spot of current research. Compared with single-layer bio-based films, multi-layer bio-based films show better mechanical properties, barrier properties, etc. Since the multi-layer packaging materials have a more complex internal structure and larger interlayer spaces between the layers (which makes them more suitable for the introduction of active substances), these materials have attracted extensive attention and research in recent years. In this paper, the construction methods of multilayer bio-based films and their applications in the field of packaged foods are reviewed. The classification of biobased packaging materials is discussed, and the preparation methods of multi-layer biobased films, including layer self-assembly technology (LbL), electrodynamic method, co-extrusion method and solvent casting method, as well as their advantages and disadvantages are introduced. The recent research progress of multi-layer biobased packaging in the field of food are comprehensively analyzed and summarized. The future research direction and development trend of bio-based multilayer films are proposed.

湖北省博士后创新实践；国家现代农业产业技术体系建设专项（CARS-46）