The utility model discloses a convenient-to-maintain busbar for a power transmission line. The device comprises a connecting part, a bus bar, a power transmission line and a connector, a connector isarranged in the middle of one side of the surface of the connecting part; a first conductive layer and a second conductive layer are arranged at the upper end and the lower end of the interior of theconnecting part; a bus bar is mounted in the middle of the other side of the surface of the connecting part; the bus bar is positioned on the opposite surface of the connector; the bus bars and the connectors are symmetrically distributed relative to the connecting part; wherein the lower end of the busbar is provided with a lower clamping piece, the upper end of the interior of the lower clampingpiece is provided with seven line holes, the seven line holes are symmetrically distributed relative to the lower clamping piece, the interior of each line hole is provided with a power transmissionline in a sleeved mode, and the two sides of the upper end of the lower clamping piece are each provided with a clamping groove. By arranging a series of structures, the device has the advantages of being convenient to maintain and good in heat dissipation effect.