The invention relates to an electric strain clamp comprises a supporting device, fixed rods, shaft fork rods, snap ring mechanisms and locking mechanisms. The fixed rods are movably installed at corners of the supporting device, ends of the fixed rods are connected to the shaft fork rods, top ends of the shaft fork rods are fixedly equipped with the snap ring mechanisms through pin shafts, and twosides of the snap ring mechanisms are equipped with the locking mechanisms by bolts. The center positions of two fixed disks are provided with first fixed holes, a support column passes the first fixed holes and is fixed to the fixed disks by spot welding, corners of the two fixed disks are provided with second fixed holes, sliding rods pass through the second fixed holes and are fixed to the fixed disks by spot welding, outer walls of the sliding rods are sleeved in fixed sleeves, and two sides of the fixed sleeves are provided with locking sleeves. According to the electric strain clamp, the stability of the wire is effectively improved by a multi-plane clamping method, at the same time, the load of construction workers in a traditional way is removed by a rolling movement mode, and thesafety of construction is improved.