The utility model discloses a power transmission line tangent tower adopting double-loop cable T-connection lower tower and relates to the technical field of high-voltage power transmission lines. The power transmission line tangent tower comprises a tower body, an upper lead wire cross arm, a middle lead wire cross arm, a lower lead wire cross arm, a T-connection upper cross arm, a T-connection middle cross arm, a T-connection lower cross arm and a T-connection bottom cross arm, wherein a lightning arrester and a supporting insulator are arranged between every two adjacent longitudinal T-connection cross arms; the upper end of the lightning arrester is connected with the upper T-connection cross arms, and the lower end of the lightning arrester is connected with the upper end of the supporting insulator; the lower end of the supporting insulator is connected with the lower T-connection cross arms; and a cable terminal is connected to a joint of the lightning arrester and the supporting insulator. Compared with the conventional T-connection lower tower of an anti-tension tower or the, the power transmission line tangent tower has the advantages that the tangent tower does not need to be changed into an anti-tnesion tower, so that the using amount of steel and the basic using amount are reduced; the construction cost is saved; lead cross arm insulator strings are in a V-string design; the windage yaw of leads is effectively reduced; and the width of a line corridor is reduced.