The invention discloses a grounding gun for a grounding wire of high-voltage equipment. The grounding gun for the grounding wire of the high-voltage equipment comprises a gun head and an insulation rod which are connected. A cavity is formed inside the gun head. A power source, an electromagnet and a pull switch are arranged in the cavity. A power source is connected with the electromagnet through the pull switch and a connection guide line. The upper end of a pull rope of the pull switch is connected with a movable contact of the pull switch. One end of the power source is connected with one static contact of the pull switch through a guide line. One end of an electromagnet coil of the electromagnet is connected with the other static contact of the pull switch through a guide line. A pull switch housing and a stay wire are electrical insulators. The power source and the electromagnet are connected with the inner wall of the cavity through an insulation rubber board. The lower portion of the gun head is provided with a gun head opening. The gun head opening is combined and connected with an electrical insulation end cover through a screw and a nut. The end cover is connected with the insulation rod. The grounding gun for the grounding wire of the high-voltage equipment is compact in structure and convenient to operate. The safety and reliability of the grounding wire assembling work can be ensured, personal injury to operators from high voltage is avoided, and the efficiency of the grounding wire assembling and disassembling work is improved.