The utility model provides a quick connection device of compound grounding body of flexible graphite, belongs to the electric power system transmission line grouding device field. Including mountain font base, U -shaped top cap and stopping spare, mountain font base includes middle roof and two side splint that set up in middle roof both sides, and middle roof is higher than two side splint, and middle roof upside sets up the arc into the undercut, open side down fixes at middle roof upside for the U -shaped top cap, and the lower tip of U -shaped top cap both sides do not is fixed in betweenthe corresponding middle roof and two side splint, open -ended cavity around forming between middle roof and the U -shaped top cap, twice tip of middle roof, two side splint and U -shaped top cap do not set up the through -hole, and stopping spare passes through -hole fixed connection mountain font base and U -shaped top cap. The device has the contact closely, low contact resistance, and the fastcharacteristics of connection speed, firm in connection is reliable moreover, has better anti -dropping effect.