Cable leading-down facility for established double-circuit strain tower

Disclosed is cable leading-down facility for an established double-circuit strain tower. The cable leading-down facility consists of an independent bearing platform and a leading-down rod tower, wherein the independent bearing platform comprises a support platform; the support platform is arranged above cross arms at the top end of a support rod, and is composed of an X-shaped cross arm and a horizontal-line-shaped cross arm, wherein the leading-down rod tower comprises a rod body, a supporting column insulator and auxiliary cross arms, wherein the rod body is close to the established strain tower; and the auxiliary cross arms are parallel to the line direction, and a plurality of layers of the auxiliary cross arms are arranged at equal intervals between the top end of the rod body and theindependent bearing platform. The device is suitable for being tightly attached to the strain tower for construction without changing the stress of the strain tower on the lower side, so that dismantling and rebuilding of an