Metalized film capacitor with high energy density and good reliability is a kind of energy storage device used widely in pulsed power systems. In this paper

the research progress on metalized film capacitor with high energy storage is introduced. The optimization scheme of self-healing performance of the metalized film is proposed with combination of its self-healing characteristic; the dielectric leakage of the capacitor is studied and it is pointed out that the reason causing voltage drop of the capacitor with high energy storage density is due to film volume leakage and relaxation polarization effects which is the main factor.The main limit factor affecting current-carrying capability is analyzed and the density and service life of the capacitor developed reach 2.7 MJ/m3 over 850 shots respectively.