DC power supply filter

The utility model provides a DC power supply filter, which comprises a bottom plate, a fixing bolt arranged on the upper end face of the bottom plate, a PCB arranged above the bottom plate, a high-capacity electrolytic capacitor welded and fixed at the central position of the upper end face of the PCB, a solid capacitor welded on the upper end face of the PCB, and a WIMA electrodeless capacitor welded on the upper end face of the PCB. A flat copper wire filter inductor is welded on the upper end face of the PCB, a DC 5.5 * 2.1 female seat is welded on the upper end face of the PCB, and a top plate is arranged above the PCB, the problem that an original DC power supply filter is poor in filtering effect and cannot be used in a high-voltage environment is solved, the DC power supply filter is reasonable in structure, multi-stage filtering is achieved through the combination of the electrolytic capacitor and the solid capacitor, and the service life of the DC power supply filter is prolonged. And the method is s