Coating a thin Aluminum layer on the surface of plastic film, will get high self-healing Aluminum metallized film for capacitor use. The prominent feature of metallized film is its self healing ability. That is, when somewhere is breakdown, short-circuit current can make the film around the breakdown area melting and evaporation to recover its insulation property. Thus significantly reduce the impact on the breakdown strength by conductive defects and weakness in paper or film, thereby improving the working field. Generally the thickness of the metal layer is 5nm-50nm, but on the international it can be 1nm-100nm. In terms of heat resistance, 1nm-100nm is preferred, when taking electric properties into consideration of electric properties, 5nm-50nm is more preferred.