Four telegram in reply cables of two loop openings draw lower column. It includes body of the tower, ground wire support, the body of the tower top is provided with the ground wire support, and ground wire support below is provided with the upper conductor cross arm, wire cross arm during upper conductor cross arm below is provided with, well wire cross arm below sets up down the wire cross arm, lower wire cross arm below be provided with the cable draw under supplementary cross arm, ground wire support perpendicular to target circuit orientation, upper conductor cross arm, well wire cross arm, down wire cross arm, cable draw down that supplementary cross arm all is the cross, and upper conductor cross arm, well wire cross arm, wire cross arm, cable draw down that each cross arm of supplementary cross arm all is 45 contained angles with the wire of being connected separately down. The utility model discloses the basic shaft tower of sampling realizes that cut -offfing of two loop line ways and cable draw down, has avoided adopting two basic shaft towers, reduces the circuit investment, and the at utmost reduces the influence to the target circuit.