The utility model discloses an efficient active power combination filter. The device comprises a device body and a dustproof net, a fan is mounted on the inner side of the bottom of the device body; an inserting hole is reserved in the outer side of the top of the device body; a mounting plate is welded on the side of the device body; a movable groove is formed in the inner wall of the mounting plate; a wiring board is connected in the movable groove; a spring is fixed between the edge of the top of the wiring board and the movable groove; side grooves are formed in the inner walls of the openings in the two sides of the device body, dustproof strips are installed in the side grooves, the dustproof net is installed at the opening in the lower end face of the device body, a butt joint plateis fixed to the outer side of the dustproof net, a fixing groove is formed in the inner wall of the opening in the lower end face of the device body, and a butt joint groove is reserved in the bottomof the fixing groove. The efficient active power combination filter can perform dust prevention and heat dissipation on internal electrical components, facilitates disassembly and cleaning of the dust prevention and heat dissipation assembly, has a wire arrangement function, and facilitates installation and maintenance of circuits.