Overhead high-voltage transmission line broken strand trimming mechanical arm device and working method thereof

The invention discloses an overhead high-voltage transmission line broken strand trimming mechanical arm device and a working method thereof in the technical field of overhead conductor repairing, and the device comprises a rotating shaft mounting bracket which is rotatably provided with a rotating shaft and a swing driving motor for driving the rotating shaft to swing; the rotating shaft is fixedly connected with an adapter seat and a swinging mounting arm, the upper end of the swinging mounting arm is connected with a mounting plate, the mounting plate is provided with a rotating movable assembly and a rotating driving motor for driving the rotating movable assembly to rotate and move, and the rotating movable assembly is provided with an inclined swinging mounting assembly; an oblique swinging driving motor is mounted at the fixed end of the oblique swinging mounting assembly, a saw blade driving motor is mounted at the movable end of the oblique swinging mounting assembly, and a trimming saw blade is moun