The utility model relates to a special earth connection in the cable distribution box elbow arm cover, its include keep silent, keep silent down, spring, insulator spindle, phase sequence handle and ground connection annealed copper wire, on the open end interlock of keeping silent and connect through the pivot open -close type with keeping silent down and keeping silent on, and descending to keep silent keep silent to keep silent under and set up the spring between the afterbody link keeping silent and descend to keep silent on, on, and connect the connection of after section phase sequence handle of insulator spindle, insulator spindle respectively, keep silent on and connect the ground connection annealed copper wire. The utility model discloses the assurance personnel's of salvageing life safety and equipment reliability improve work efficiency, shorten the recovery work time, reduce the customer complaint rate.