High-barrier flexible package film for lithium battery

The utility model discloses a high-barrier flexible package film for a lithium battery and aims to provide a high-barrier flexible package film for the lithium battery, which does not require chemical treatment on an aluminum foil layer, has low manufacture cost, is relatively environmentally friendly, and can prolong the service life of the lithium battery. The flexible package film for the lithium battery takes the aluminum foil layer (1) as the middle base layer, a nylon layer I (2) is arranged on the outer surface of the aluminum foil layer (1), a heat sealing layer is arranged on the inner surface of the aluminum foil layer (1), the heat sealing layer is a multilayer co-extrusion film consisting of a chlorinated polypropylene layer (3), a nylon layer II (4), a vinyl alcohol copolymer layer (5) and a nylon layer III (6) sequentially arranged from outside to inside, one side of the multilayer co-extrusion layer with the nylon layer III (6) is drily composited with one side of the aluminum foil layer (1) through adhesives, and the other side of the aluminum foil layer (1) is drily composited with one surface of the nylon layer I (2). The high barrier flexible package film for the lithium battery can be widely applicable to the package field of the lithium battery.