Overhaul tool for replacing overhead optical cable of power transmission line

The invention relates to a maintenance tool for replacing an overhead optical cable of a power transmission line. A right arm is clamped on one side in a cross arm box body of the tool, a left arm is clamped on the other side, a first pulley and a second pulley are fixedly arranged in the middle in the cross arm box body through a rotating shaft, and a shaft hole is formed in the rotating shaft; third pulleys are fixedly arranged at the ends, away from the cross arm box body, of the right arm and the left arm, steel wire ropes are fixed to the first pulley and the second pulley respectively, the two steel wire ropes wind around the corresponding third pulleys, and wire supporting hooks are fixed to the ends of the steel wire ropes. The edge of the first pulley and/or the second pulley is arranged to be of a tooth-shaped structure, and a locking structure is further arranged above the cross arm box body. The problems that no device for lifting the optical cable exists at present, and an existing method for lif