采用增塑剂对聚乙烯醇（PVA）改性，以改性PVA为掺杂相，制备聚氯乙烯/聚乙烯醇（PVC/PVA）复合薄膜，分析PVA的用量对PVC/PVA复合薄膜亲水性、力学性能、透湿性能、保温性能的影响。结果表明：加入适量的改性PVA可以制备性能优异且具有较佳亲水性、透湿性能及保温性能的薄膜。当加入质量分数为3%的PVA时，制备的薄膜具有优异的力学性能，继续增加PVA，复合薄膜的力学性能降低。相较于PVC薄膜，改性PVC/PVA复合薄膜具有良好的透气性，对温度调节起到良好的作用，具备良好的保温透湿效果。

Using plasticizers to modify polyvinyl alcohol (PVA), modified PVA was used as the doping phase to prepare polyvinyl chloride/polyvinyl alcohol (PVC/PVA) composite films. The influence of PVA dosage on the hydrophilicity, mechanical properties, moisture permeability, and insulation properties of PVC/PVA composite films was analyzed. The results show that adding an appropriate amount of modified PVA can prepare films with excellent performance, good hydrophilicity, moisture permeability, and insulation properties. When the mass fraction of added PVA is 3%, the prepared films have excellent mechanical properties. Continuing to increase PVA, the mechanical properties of the composite films decrease. Compared with PVC film, modified PVC/PVA composite film has good air permeability, plays a good role in regulating temperature, and has a good effect on insulation and moisture permeability.