A wire clamp capable of preventing a wire from being broken belongs to the technical field of insulation wires. A lightning arrester is connected with an insulator by nuts, the insulator is connected with an insulation water-proof cover, a pressure plate capable of preventing the wire from being broken and an upper and lower pricking-pin pressure plate, wherein the insulation conduction wire is fixedly connected with the pressure plate capable of preventing the wire from being broken and the upper and lower pricking-pin pressure plate by bolts, an arc strike rod is connected with the insulator, the lower pricking-pin pressure plate of the upper and lower pricking-pin pressure plate is integrally connected with the insulator, two bolts are used for fixing the upper pricking-pin pressure plate of the upper and lower pricking-pin pressure plate and the upper pressure plate capable of preventing the wire from being broken, four bolts between the upper pressure plate capable of preventing the wire from being broken and the lower pressure plate capable of preventing the wire from being broken are used for fixing the insulation conduction wire, the pressure plate capable of preventing the wire from being broken has an radian of 4 degrees relative to the horizontal level, and an insulation water cover is arranged on the top of the pressure plate. The wire clamp capable of preventing a wire from being broken plays its anti-fracture effect due to the sealing cover, and also has the functions of such as preventing the water from entering into the insulation layer, preventing the insulation wire core from being corroded and preventing the wire from being broken when the insulation wire core is pricked. The wire clamp is simple in structure, convenient to install and conducive to the promotion.