This paper mainly introduces the design and application of a flexible cableway anchorage system that can provide anchorage points for the anchorage device (V-shaped anchorage platform) and enable the anchorage device to slide freely to any position within its own alignment during the erection of the main supporting structure of the FAST active reflector of the Radio telescope at Guizhou Observatory. The flexible cableway anchoring system is an aerial cableway that connects the bottom of the cable network and the ring beam in the cable network installation project. It is used to provide the anchoring points of the V-shaped anchoring platform at different segments during the cable network installation process. The system consists of four steel wire rope cableways, with the upper end anchored in the form of a hoop fixed to the chord of the ring beam, and the lower end fixed to an independent tower at the bottom of the cable network in the form of a pin with an adjustment device. During the construction process, the flexible track anchoring system cable line shape can be adjusted to ensure that the V-shaped anchoring platform is in the optimal hanging position