The utility model relates to a flat mouthful of formula earth connection on improvement type, including handheld insulator spindle, adorn the spill admittedly on the last top of insulator spindle and press from both sides the frame, the spill installs branch pipe under the hyoplastron on pressing from both sides the frame lower plate, on grafting hyoplastron pillar in the upper shed of branch pipe under the hyoplastron, the top rigid coupling of pillar presss from both sides hyoplastron line the for on the hyoplastron, and the outside of pillar on branch pipe and the hyoplastron is overlapped and is equipped with the fastening spring of rigid coupling between hyoplastron and clamp frame lower plate under the hyoplastron, the hyoplastron left end tongue oralia head of making the downwarping as an organic whole, the left end of spill clamp frame upper plate is the lead wire wrench of kickup, and tongue oralia head aligns with the wrench left side that goes between and outwards opens one's mouth, and the outside welding of pressing from both sides the frame in the spill has earth conductor. The utility model discloses it is greatly convenient to bring for the work of examining and repairing the operation personnel, has also avoided resulting in dangerous emergence because temporarily remove the ground wire, provides the safety guarantee for the operation personnel.