More and more cable-stayed bridges are being constructed in China. With the arrival of the service life of the cables, in order to extend the service life of the bridge, it is necessary to replace the cables. This article focuses on the replacement construction technology of stay cables for the Huxi Bridge in Liuzhou. This bridge is a prestressed concrete single tower double cable plane cable-stayed bridge with a span of 2 × 120 meters. The upper structure of the cable-stayed bridge is a plate beam structure, with 26 pairs of fan-shaped cables symmetrically arranged on both sides, totaling 104. The construction process of cable replacement includes: tensioning and dismantling of old cables; Installation and tensioning of new cables; Corrosion prevention in the anchoring area of Xinsuo; Construction measurement (cable force, elevation, displacement)