Flexible transmission line

A flexible transmission line disclosed by the present invention comprises a main body, the main body comprises a bending area and non-bending areas, the two ends of the bending area are respectively connected with the non-bending areas, and the main body comprises a lower cover film layer, a line layer, a lower flexible dielectric layer, a colloid layer, an upper flexible dielectric layer, a ground layer and an upper cover film layer which are sequentially stacked and connected from bottom to top. The bending area is provided with a first vacancy part and a second vacancy part, the first vacancy part extends from the top surface of the upper covering film layer to the top surface of the upper flexible dielectric layer, and the second vacancy part extends from the bottom surface of the upper flexible dielectric layer to the top surface of the lower flexible dielectric layer; the circuit layer is provided with a radio frequency line and ground wires, the ground wires are connected with the ground layer, the gro