The invention provides a multi-strand core wire three-section type electric connector which comprises a plug section, a connecting section and a
tail clamp section which are sequentially arranged in the axial direction, and the plug section is in threaded connection with the connecting section, and the connecting section is in threaded connection with the
tail clamp section. The plug section comprises a plug section body and a plug locking ring, the plug locking ring is arranged on the
peripheral surface of the plug section body in a sleeving mode, and a plurality of
welding pins are arrangedat the end, close to the connecting section, of the plug section body; a clamping part is arranged at the end, away from the connecting section, of the
tail clamping section. A pressing ring is arranged at the end, close to the connecting section, of the tail clamping section and comprises an elastic ring, and at least one part of the elastic ring protrudes inwards in the radial direction to forman annular
extrusion part; the multi-strand core wire three-section type electric connector is simple in structure, easy and convenient to manufacture, high in production efficiency, low in cost, basically free of
pollution, firm, reliable and suitable for connection of three-section type electric connectors of electronic cabinets on ships.