The utility model discloses a power supply is laid and is used safe jointing clamp, including last pincers handle, lower plier handle and pivot, on clamp handle, lower plier handle and pivot the surface all nestedly have an electro -insulating rubber, the lateral surface that clamps handle and lower plier handle on and all is provided with physically groove of pincers, on clamp handle and lower plier handle the left end all be connected with the pivot, and the left end of pivot installs the pincers body and the pincers body down respectively, goes up the pincers body and lead to over twistingpower spring and be connected with the pincers body down, and the arrangement of torque spring's surface there is a torque spring visor, go up the pincers body and be provided with first recess and second recess down between the pincers body, and go up and clamp the leading flank of personally experiencing sth. Part of the body and inlay and have the survey electric installation. This power supplyis laid and is used safe jointing clamp adopts pincers body groove, surveys the electric installation and hold the design of closing the hole, can reduce jointing clamp volume portable, surveys the electric installation and can avoid electro -insulating rubber by the emergence of the high -voltage breakdown condition, guarantees the personal safety of maintenance person person, can increase the firm degree and the comfort level that grip.