Aluminum plastic composite film, abbreviated as aluminum-plastic film, is a composite soft packaging shell material used for encapsulating lithium-ion batteries, commonly used in soft pack batteries and blade batteries. Sealing the assembled single cell with aluminum-plastic film can play an important role in protecting the internal electrodes and isolating the external environment. Due to the fact that the material used to package the battery cell needs to resist the swelling, dissolution, and absorption of the electrolyte, while ensuring strict barriers between oxygen and moisture, aluminum-plastic film must have five characteristics: puncture resistance, high barrier resistance, electrolyte resistance, high temperature insulation resistance, and high cold stamping formability.