目的 综述近几年有关将纳米填料纳米纤维素晶体(CNC)作为增强补强剂，提高聚乙烯醇(PVA)薄膜的物理性能方面的研究，以期为PVA薄膜材料的进一步开发和应用提供参考。方法 通过对相关文献进行收集与整理，阐述PVA/CNC复合薄膜的应用现状，介绍CNC的形貌特性、化学改性及成膜方式对改善PVA/CNC薄膜物理性能的研究现状，综述CNC分散性、交联剂和成膜条件对提高PVA/CNC复合薄膜物理性能的影响。结论 通过增加CNC在PVA基体中的分散性，针对不同用途选择对应的成膜方式，这样可有效改善PVA薄膜的力学性能、阻隔性能和耐水性等，提高PVA薄膜的使用价值。

The work aims to review research on the enhancement of the physical properties of PVA films by using nanocellulose crystal (CNC) as the reinforcing agent, improve the research on physical properties of PVA films, so as to provide reference for the further development and application of PVA film materials. In this work, through the collection and sorting of relevant literature, the application progress of PVA/CNC composite film was described. The progress of improving the physical properties of PVA/CNC film by the morphology characteristics, chemical modification and film forming method of CNC were introduced. The effects of CNC dispersion, crosslinking agent and film forming conditions on improving the physical properties of PVA/CNC composite films were reviewed. By increasing the dispersion of CNC in PVA matrix and selecting corresponding film forming methods for different uses, the mechanical properties, barrier properties and water resistance of PVA film can be effectively improved, thus the use value of PVA film can be improved.