The utility model provides a fastener of mould is made to high -voltage switch electric conductor, belongs to high -pressure electrical equipment field, including the double -screw bolt, and round pin axle, check lock lever, the double -screw bolt lower extreme have the external screw thread, external screw thread and casting die utensil on fastener screw hole matching, the round pin axle set up in the double -screw bolt upper end, the check lock lever install in the rectangle opening of double -screw bolt upper end, for the flat structure, be provided with the slotted hole that length is greater than double -screw bolt upper end diameter at the head of check lock lever, the width of slotted hole is greater than hinge pin diameter, the slotted hole is less than the distance of round pin axle to the rectangle opening of double -screw bolt upper end bottom to the distance of check lock lever head, the lower base of slotted hole be the inclined plane, its inclination is lighter than the friction angle of check lock lever and round pin axle, the check lock lever head be provided with with holding the concentric circular arc of the circular arc of slotted hole, the afterbody of check lock lever be provided with the transition circular arc, have locking and need not pull down fastener when loosening, characteristics that work efficiency is high.