The utility model discloses a grounding device, including first semi -ring and second semi -ring, first semi -ring with every tip of second semi -ring all is equipped with fixed ear, be equipped with the fixed orifices on the fixed ear, the passing through of first semi -ring and second semi -ring fixed orifices and bolt reciprocal anchorage are the annular. The ground loop seam crossing be the chamfer, can effectively prevent the jump brush that local bump arouses or strike sparks, the junction is the tang and connects, prevents in the work between two semi -rings drunkenness each other, increases the steadiness, offside bolt reverse locating when preventing because of the bolt fastening with one side, results in existing a side clearance because of the two -body structure characteristic, the convenient dismantlement, it is convenient to maintain, practices thrift the cost.