The utility model discloses a special antitheft bolt for a field iron tower anchor clamp, comprising a bolt head, a screw cap and a stud, wherein both the bolt head and the screw cap are in a hexagonal frustum pyramid structure, a bolt head convex edge is arranged in the middle part of each side of the bolt head, and a screw cap convex edge is arranged in the middle part of each side of the screw cap; and both the bolt head convex edges and the screw cap convex edges are distributed in an arc-shaped manner. The special antitheft bolt can be conveniently removed only by using a special mating dismantling device, has a good antitheft effect, and can be utilized repeatedly, so that the line maintenance cost is remarkably saved, and the economic benefit is improved.