Wire tightening device for erecting overhead conductor

The wire tightening device comprises a wire clamping support and a wire tightening frame, a wire pulling ring is arranged on a connecting frame, and a hoop is arranged at the end, close to the connecting frame, of a connecting plate; a fixed hook is arranged at one end of the wire tightening frame, rotating shafts extending out of the wire tightening frame are arranged at two ends of the steel cable roller, and non-return mechanisms are arranged at the upper ends of the rotating shafts; a motor is arranged on one side of the upper portion of the frame, a swing plate is arranged on the lower portion of the driving plate, one end of the swing plate is hinged to the fixed end base, the driving shaft is arranged in a kidney-shaped groove of the swing plate in a clearance mode, the tail end of the swing plate is connected with a kidney-shaped groove of the first sliding block in a clearance mode through a connecting shaft, and a rocker is hinged to the lower end of the connecting shaft. A fixing rod is arranged on