Iron tower foundation of power transmission line

An iron tower foundation of a power transmission line is formed by a pile body and an expanded-base end below the pile body. The pile body is formed by a slant pile body on the upper portion and a perpendicular pile body on the lower portion, and an included angle formed by the slant pile body and the perpendicular pile body is larger than 0 degree and smaller than or equal to 30 degrees. According to the technical scheme, the slant pile body can be considered to be extension of a tower leg of an iron tower, foundation acting force equivalently acts on a cross face of the slant pile body and the perpendicular pile body directly, accordingly influences of horizontal acting force in a height scope of the slant pile body can be removed, horizontal deformation of the pile body is greatly reduced, the sectional dimension of the pile body is effectively reduced, meanwhile, basically no construction difficulty is increased, and the iron tower foundation has quite considerable economic and social benefits.