Paper-based environment-friendly water-oxygen barrier film and preparation method thereof

The invention provides a paper-based environment-friendly water-oxygen barrier film and a preparation method thereof, and relates to the field of food and medicine packaging. The paper-based environment-friendly water-oxygen barrier film comprises a paper-based substrate and a water-oxygen barrier layer arranged on the paper-based substrate, the water-oxygen barrier layer comprises a polyvinyl alcohol layer, a metal nano layer and a ceramic barrier layer which are sequentially stacked, and in one water-oxygen barrier layer, the polyvinyl alcohol layer is close to the paper-based substrate, and the ceramic barrier layer is far away from the paper-based substrate. The film provided by the invention is uniform and strong in binding force, has good waterproof and anti-oxidation effects (WVTR is less than 5 * 10 g/m < 2 > day, and OTR is less than 5 * 10 ml/m < 2 > day), has good strength and flexibility, has excellent reprocessing performance, and is suitable for the high-barrier, degradable and recyc