The pedestrian cable bridge of Wanjiazhai Dam on the Yellow River was originally a temporary structure. After more than ten years of application, it is now required to strengthen the superstructure of the main bridge according to the permanent structure system in order to make it a permanent structure. The main cable anchorage system of a cable bridge is the lifeline of the entire cable bridge, and its durability and reliability are key to the sustainable use of the entire cable bridge. Due to the use of imported steel wire rope systems from the 1950s as the main cable of the cable bridge, which is a construction turnover material, and the fact that the original anchorage system of the cable bridge used a structure of tight fitting and rope clamps, it posed significant challenges to ensure that the new reinforcement system worked together with the original system. After different experimental studies, a new combined anchoring system of "three piece clamping, epoxy mortar wrapping, and support box force transmission" was ultimately adopted. This system adopts special tensioning and top pressing processes, which can use the new clamping system to bear the force together with the original system, and has good gripping and protective effects. It has a good reference and reference value in the same type of structural system