The utility model discloses a high reliability through ground wire, strand in circle copper conductor surface including the round copper conductor that is located the center, 6 trapezoidal copper conductors, the diameter of circle copper conductor is 1.8~2.2mm, and the length of lay of these 6 trapezoidal copper conductors is 50~70mm, a seamless metal sheath layer cladding in 6 trapezoidal copper conductor surfaces, seamless metal sheath layer surface has a metal passivation layer, the short base of this trapezoidal copper conductor be the arc limit and with circle copper conductor contact, the long base of this trapezoidal copper conductor is the arc limit and just contacts with seamless metal sheath layer, the cladding of circle copper conductor surface has an insulating layer, and the long base both ends corner that lies in trapezoidal copper conductor is circular arc corner portion. The utility model discloses high reliability through ground wire has further improved the stability of high reliability through ground wire structure and has reduced resistivity, and can find out fast and damage or the interruption position, and convenient maintenance has also improved reliability of an item.