<正>In order to clear up the electric power network pollution of low power factor and harmonics caused by marine electrical facilities, especially power electronic devices, several choices concerning power factor correction circuits and power filters are listed in this paper, such as typical Static Var Compensators (SVC), Static Var Generators (SVG), Passive LC Filters (PF), Active Power Filters (APF) and Active Power Factor Correction Circuits (APFCC). Then a new approach-the Combination of Active Power Factor Compensator and Series Active Power Filter aided by Parallel Passive Filter-is proposed for marine electric power network. In this combined system, the Series APF, which works together with shunt passive filter PF, is supposed to solve the problems of conventional filters according to its working principles.