The utility model discloses an earth connection assembly, the mobile jib body and the vice body of rod including parallel arrangement, the top of the mobile jib body is provided with the fixed dop with binding post matched with, the top of the vice body of rod is associative move to another place be provided with with the movable clamping head of fixing clip head -clamp tight fit, the overhead edge of fixing clip the axial of the mobile jib body runs through there is the guiding hole, movable clamping head's terminal slidable ground cartridge in the guiding hole, the middle part of the mobile jib body rotationally is provided with the adjusting gear, the axis of adjusting gear with the axis of the mobile jib body is mutually perpendicular, the terminal coaxial coupling of the vice body of rod have with adjust the screw rod of gear engagement adaptation. This earth connection assembly's connection structure safe and reliable and operation process simple accurate.