The utility model discloses a railway integrated through earth wire and an earth wire discharge single body thereof. The earth wire discharge unit single body comprises a copper alloy part located at the outer layer and an earth wire discharge metal alloy part located at the center layer, wherein the copper alloy part and the earth wire discharge metal alloy part are composited in a metallurgical combination mode. The earth wire discharge unit single body disclosed by the utility model achieves an objective of high corrosion resistance by using the high corrosion prevention of the metal alloy, and the service life exceeds 30 years. Furthermore, compared with a lead sheath and other macromolecule sheathes, the earth wire discharge unit single body can achieve a design objective of environmental protection. Meanwhile, two kinds of functional units of the through earth wire are respectively designed to be an earth wire discharge unit single body and an earth wire intelligent detection unit single body. The unit single bodies can realize free combination at design levels of the quality, materials, the cabling mode and the like, breaks up the whole into parts, and is flexible in structural design and combination, and strong in field applicability.