Abstract: A coating film for labels of daily chemicals, beer, cosmetics, beverages, electronic products, and toys. A Biaxially Oriented Polypropylene (BOPP) extruded coating film includes a functional layer, a core layer, and a sub-functional layer. The core layer is located between the functional layer and the sub-functional layer. The functional layer, the core layer, and the sub-functional layer are co-extruded, and then biaxially stretched to form a unity. The weight percentages of the material of the functional layer, the material of the core layer, and the material of the sub-functional layer are 5-20%, 60-90%, and 5-20% respectively. The material of the functional layer is formed by mixing 30-60% of acrylic acid modified polyethylene, 30-45% of a polypropylene block copolymer, 7-20% of C9 hydrogenated petroleum resin, 1-3% of an antioxidant, and 1-2% of a dispersing agent.