The embodiment of the invention discloses a high current DC filter, which comprises a first iron core and a second iron core arranged on a primary winding in a sleeving mode, wherein the first iron core is provided with a gap, the gap is internally provided with a Hall sensor, the output end of the Hall sensor is sequentially serially connected with a low pass filter circuit, a preamplifier circuit, a servo current source, a second secondary winding arranged on the second iron core and a first secondary winding arranged on the first iron core, and the other end of the first secondary winding is grounded. According to the high current DC filter provided by the embodiment of the invention, the first secondary winding arranged on the first iron core and the second secondary winding arranged on the second iron core and the primary winding generate magnetic fields with the same size and opposite direction, DC zero flux is formed inside the first iron core and the second iron core, a large inductance value is generated as the second iron core has no gap, and high restraint effects are played on DC high current ripples.