The work aims to prepare a novel thermal method based on pure CPP layer for preparation of aluminum plastic film to improve the thermal sealing and anti-corrosion performance of aluminum plastic film. Different from the traditional dry and thermal method, a single layer of pure polypropylene (CPP) was casted onto the aluminum foil with pre-deposited nano metal anticorrosive coating, resulting in strong bonding between CPP and aluminum. This method solved the long-standing problem of poor adhesion between pure CPP and aluminum. The surface morphology of aluminum foil and aluminum plastic film as well as the thermodynamic properties and thermal sealing properties of and aluminum plastic film were studied. The nano coating increased the surface roughness of the aluminum foil, leading to larger contact area between CPP and aluminum. The thermal sealing test results showed that the thermal sealing strength of the first sealing of pure CPP thermal method exceeded 140 N/15 mm. After soaking in electrolyte, the thermal sealing strength of the second sealing was still close to 140 N/15 mm. The aluminum plastic film produced by pure CPP thermal method exhibits good thermal sealing performance and electrolyte corrosion resistance. It is suitable for the application in power batteries.