In recent years, as the protection problems of cable-stayed bridges are constantly being solved and improved, the related technology is also applied to the corrosion prevention of extracorporeal prestressing bundles, thus the problem of corrosion prevention of steel cables, which has been a key factor restricting the development of extracorporeal prestressing structures for several decades, has been solved to a large extent, and this undoubtedly greatly promotes the development of extracorporeal prestressing bridges, which have been stagnant due to the problem of corrosion. Prestressed concrete buildings constructed with in vivo reinforcement are severely damaged due to underestimation of the loss of prestressing force due to friction and the effects of concrete creep and temperature, resulting in the need for most of them to be reinforced, and the increase in load ratings requires the reinforcement of the original building. The reinforcement method usually has to be carried out outside the original structure, i.e., the prestressing Cambodia must be arranged outside the concrete cross-section, so that the extracorporeal cable reinforcement has become a major and the most active bridge reinforcement method. The advantages of extracorporeal prestressing system have been recognized by more and more people. Especially in developed countries, extracorporeal prestressing technology is widely used.