The invention relates to the technical field of cable clamps, in particular to a safe cable clamp, comprising a cable clamp and a constraining device, wherein the lower part of the cable clamp is twoinsulating handles capable of controlling the opening and closing of the cable clamp jaws, and a constraining device capable of binding two insulating handles of the cable clamp is fixedly installed on one of the insulating handles of the cable clamp. As the structure of the invention is reasonable and compact, easy to use, By fixing the strap on an insulated handle of the wire tongs, Then, the two insulating handles of the cable clamps are fixed together by the binding tape, so that the cable clamps are closed, and the sub-surface magic sticker and the parent surface magic sticker can ensurethat the two insulating handles of the cable clamps are firmly combined, thereby effectively preventing the hands of the operators from being scratched and avoiding the loss of the constraining device.