The utility model discloses a busbar grounding wire used for a 10-35kV centrally-arranged type switch cabinet. The busbar grounding wire comprises an insulated handle and a grounding wire plug-in type joint installed at an end portion of the insulated handle, wherein the grounding wire plug-in type joint is connected with a grounding wire; the grounding wire plug-in type joint is a conducting cylinder; a plurality of open slots are formed in the conducting cylinder along the axial direction of the conducting cylinder; the conducting cylinder is divided into a plurality of sections; an annual groove is formed along the outer circumference of the cylinder and is adjacent to the front end portion of the conducting cylinder; and a spring hoop used for tightening the conducting cylinder sleeves the annual groove. Compared with a traditional grounding mode, with the busbar grounding wire of the utility model adopted, a field operator can be far away from electrified portions such as a closed room of the switch cabinet, and therefore, security risks of workers and equipment can be greatly reduced; a contact is specially designed, and the conducting cylinder is divided into a plurality of sections, and the spring hoop used for tightening the conducting cylinder sleeves the annual groove adjacent to the front end portion of the conducting cylinder, and therefore, the slippage of a busbar contact can be effectively prevented, and the reliability of busbar grounding can be ensured.