The utility model relates to a multi-winding zero sequence filtering electricity-saving device which is combined by three iron core columns, the placing special positions of the iron core columns are of a structure shaped like a Chinese character 'pin' and are symmetrically arranged, the mutual difference of the spatial degree is 120 degrees, a coil A1, a coil a1, a coil a2, a coil a3, a coil A2, a coil A3, a coil B1, a coil b1, a coil b2, a coil b3, a coil B2, a coil B3, a coil C1, a coil c1, a coil c2, a coil c3, a coil C2 and a coil C3 are coiled on the iron core columns, the coil A3, the coil B3 and the coil C3 are coiled in an anticlockwise mode, the other coils are coiled in a clockwise mode, the tail ends of the coil c3, the coil a3 and the coil b3 are used as output ends and are respectively and correspondingly matched and connected with an input end a, an input end b and an input end c of a loading system, and the head ends of the coil A3, the coil B3 and the coil C3 are connected together and connected with a neutral line of the loading system. The multi-winding zero sequence filtering electricity-saving device can effectively solve the problems that the voltage is high, the three-phase load is unbalanced and the harmonic wave pollution exists in a three-phase four-wire low voltage power distribution system, and the electricity using rate can be well improved.