The invention relates to a busbar fitting. The busbar fitting comprises an upper fitting base and a lower fitting base, wherein a lower penetrating groove is formed in the top of the lower fitting base, the length of the lower penetrating groove extends in the front-and-back direction, an upper penetrating groove is formed in the bottom of the upper fitting base, the length of the upper penetrating groove extends in the front-and-back direction, the upper penetrating groove and/or the lower penetrating groove is provided with at least two clamping protrusions arranged in a spaced mode in the front-and-back direction, each clamping protrusion is provided with an arc-shaped clamping surface used for being in contact fit with the outer circumferential surface of a corresponding busbar, and a receding groove used for receding of a protrusion part of the busbar is formed by a gap between every two adjacent clamping protrusions. According to the busbar fitting, the flow passage area between the busbar and the busbar fitting is increased, and the busbar can be fully clamped easily and prevented from moving in the axial direction; meanwhile, due to the fact that busbar bends slightly at the positions where the protrusion parts of the busbar sink into the receding grooves after the protrusion parts of the busbar sink into the receding grooves, the capacity for preventing the busbar from moving backwards or forwards of the busbar fitting is further improved. The busbar fitting has the advantages that the structure is simple, cost can be reduced easily, and operation is convenient.