The utility model discloses a wiring rod for a transformer station cable trench, comprising a plurality of wiring rod main bodies which are connected through end-to-end; the wiring rod main body is a straight rod, the cross section of which is a square; and the adjacent two wiring rod main bodies are connected through a foldable connector. After the adoption of the novel wiring rod for the cable trench, only one concrete cover plate is lifted up every 20 meters according to the practical needs instead of lifting up whole cover plate, which greatly saves the labors. The usage of the wiring rod is simple, and the wiring is quick. The wiring rod disclosed by the utility model is applicable to the narrow cable trench and fully improves the cable wiring efficiency.