The invention relates to the technical field of power wires, and specifically relates to a power wire. The power wire comprises a first wire harness and a second wire harness, wherein the first wire harness comprises a first ground wire, a first live wire and a first null wire; the second wire harness comprises a second ground wire, a second live wire and a second null wire; one end of each of the first ground wire, the first live wire and the first null wire is simultaneously connected with a connecting plug, and a first ground terminal, a first live wire terminal and a first null wire terminal are correspondingly arranged at the other end of each of the first ground wire, the first live wire and the first null wire; a ground wire terminal, a second live wire terminal and a second null wire terminal are correspondingly arranged at one end of each of the second ground wire, the second live wire and the second null wire, the other end of the second live wire is connected with the first live wire terminal, the other end of the second null wire is connected with the first live wire terminal, and a second ground terminal is arranged at the other end of the second ground wire. By use of the power wire, the difficulty in field wiring and the complexity of wiring can be greatly reduced.