The invention discloses an attached type lifting device of a transmission tower. The attached type lifting device of the transmission tower comprises a main pole, an outside pulling wire, a supporting rope, a reverse Y-shaped pole, an amplitude modulation rope group and a lifting tackle group, wherein the main pole is higher than the top of the transmission tower, the end of the reverse Y-shaped pole assembled on the ground in advance is provided with the upper half component of a third hinged support, the third hinged support is mounted at the upper part of the transmission tower body, an upper cross arm and a ground wire bracket are controlled by a control rope, a first hinged support is mounted at the head of the main pole and is connected with the upper end group of the amplitude modulation rope group, the other end group of the amplitude modulation rope group is connected with a second hinged support, the other end of the reverse Y-shaped pole opposite to the second hinged support is provided with a third hinged support with a three-hole connecting plate, one end of a fixed-length steel wire rope of the amplitude modulation rope group is mounted at the side of the third hinged support of the reverse Y-shaped pole connected with the main pole, the right of the three-hole connecting plate of the third hinged support is provided with a main lifting 100 kN 2-2 pulley rope group, the interval between two pulleys is regulated to 15 meters and then the pulleys are bound with the reverse Y-shaped pole, a movable pulley of the pulley rope group is hooked with a spare steel wire rope, and fastening flange bolts are mounted at the lower part of the second hinged support.