Grounding device for medium-voltage C-GIS switch cabinet and use method thereof

The invention provides a grounding device for a medium-voltage C-GIS switch cabinet and a use method of the grounding device. The grounding device comprises a connecting wire, a grounding wire, a protective shell, a clamping component and grounding contacts, wherein the clamping component is clamped and mounted on a grounding bar of the medium-voltage C-GIS switch cabinet, and the grounding contacts are A-phase, B-phase and C-phase respectively. The grounding contact comprises a conducting rod and a connecting structure used for being connected with the medium-voltage C-GIS switch cabinet, and the connecting structure is arranged at one end of the conducting rod; the number of the connecting wires is equal to that of the grounding contacts, one ends of the three connecting wires are connected with the ends, away from the connecting structures, of the conducting rods respectively, and the other ends of the connecting wires are gathered through the protective shell and connected with the grounding wires; and th