Power line anti-collision alarm device

The invention relates to the technical field of power equipment, and discloses a power line anti-mistaken-collision alarm device which comprises a mounting frame, an alarm device arranged on the mounting frame and an opening and closing device electrically connected with the alarm device. The starting block horizontally slides above the mounting frame and is matched with the limiting switch, the top frame vertically slides below the mounting frame, the movable pulley is arranged on the top frame, a sliding block slidably connected to the upper end face of the mounting frame is arranged on the upper end face of the mounting frame, the top frame ascends and abuts against one end of the sliding block, and the other end of the sliding block is connected with the starting block. Two holding devices which are arranged at intervals and used for fixing the power line are arranged on the mounting frame, one end of the power line penetrates through one holding device, is wound below the movable pulley and then penetrat