Electrical power busbar connecting device

The utility model provides an electrical power busbar connecting device, which comprises a main mounting seat, a mounting shaft is rotatably arranged between the main mounting seat and an auxiliary connecting seat, the circumferential surface of the mounting shaft is rotatably connected with a first connecting sleeve, and the first connecting sleeve is fixedly connected to the side part of the main mounting seat. Two second connecting sleeves are rotationally connected to the circumferential surface of the mounting shaft, the two second connecting sleeves are fixedly connected to the bottom of the auxiliary connecting base, a protective shell is fixedly connected to the side of the main mounting base, and an adjusting assembly is arranged in the protective shell; the connecting angle between the busbars is flexibly adjusted, installation is facilitated for workers, the self-locking effect of the worm gear and the worm is utilized, after the rotary knob stops rotating, the rotating angle of the auxiliary conne