The utility model relates to a transmission tower that adapts to precipitous topography, transmission tower include body of the tower, tower leg and with the conversion truss of body of the tower and tower leg transitional coupling, the conversion truss adopts the truss structure, and the body of the tower is connected to the upper end of conversion truss, and the lower extreme of conversion truss sets up four tower legs, four equal vertical settings of tower leg. The conversion truss includes the same and upper and lower parallel arrangement's of structure upper truss and lower floor's truss, upper strata truss and lower floor's truss are the plane truss who comprises horizontal member in same horizontal plane and slope member, be connected with vertical member and slope member between upper strata truss and the lower floor's truss, be equipped with four vertical downwardly extending's main material in four angle departments of upper truss and lower floor's truss, on the lower extreme of every main material all is connected to lower floor's truss through oblique material, main material and be equipped with supplementary material to one side between the material, main material, oblique material and supplementary material constitute the tower leg. The utility model discloses reduced that the iron tower takes up an area of and the evolution volume of column foot base face, improved the ability of the precipitous topography of iron tower adaptation.