The utility model discloses an it installs and connects earth clamp location mounting to lead electrical drainage, including left part spare and the right part spare that corresponds mutually, put atthe central point of left part spare and be provided with left side strip connected in star, to put at the central point of right part spare and be provided with right side strip connected in star, left side strip connected in star is all corresponding with the thickness and the width of leading electrical drainage with the thickness and the width of right side strip connected in star, upper portion and lower part at left part spare are provided with two left side through circular hole, are provided with two hidden chamber grooves in right side in the upper portion and the lower part of rightpart spare, partially do not are provided with stealthy nut at two the hidden chamber in right side inslots, are provided with interior hexagonal bolt at two left side through circular hole and two the hidden chamber in right side inslots. The utility model discloses simple structure, easy preparation can effectively prevent to meet earth clamp because switch transmission vibrations or maintainerreceive collision, cause the fastener from leading the drop emergence of phenomenon of electrical drainage overhauing the in -process earth connection, guarantee maintainer or staff's personal safety,the elimination potential safety hazard.