▎ 摘　　要

NOVELTY - Composite packaging material comprises outermost waterproof layer, base layer, barrier layer and innermost layer in contact with contents of package, the barrier layer comprises nanocellulose, the length of at least one dimension of the nanocellulose is less than 100 nm, the gram weight of the nanocellulose is 0.1-20g/m2, the barrier layer has oxygen permeability of less than 100cm3/(m2.24h.0.1Mpa) under measurement conditions of air humidity of 0%RH, temperature of 23°C, pressure of 0.1Mpa and thickness of less than 100 μm. USE - The composite packaging material is useful for liquid package. ADVANTAGE - The composite packaging material: has strong oxygen barrier property and degradable property; is environmentally friendly; and can significantly reduces the environmental burden caused by the difficulty of degradation of traditional aluminum-plastic composite packaging materials.