The aluminum-plastic packaging film is the outer packaging material of the soft-packed lithium ion battery. Due to the thinness and lightness of the terminal equipment, batteries and cylindrical batteries originally packaged in metal aluminum casings are gradually replaced by soft-pack batteries. In addition, from the development of power batteries, both passenger cars and commercial vehicles need to be equipped with lighter weight and higher energy lithium-ion power batteries, and the power battery with aluminum plastic flexible packaging provides relatively good weight energy density. The internationally popular Nissan's Leaf and the US General Motors Volt use lithium-ion batteries in aluminum-plastic packaging. In 2016, the demand for aluminum-plastic packaging film for lithium-ion batteries in China was about 95 million square meters, a year-on-year increase of 44%. The market size was about 3.2 billion yuan, a year-on-year increase of 51%. It is estimated that by 2017, the market size of aluminum plastic film will reach 3.83 billion yuan.