The disadvantage of post-tensioned prestressed projects is that the accidents of pressurized injection mud and insufficient filling of pressurized injection occupy a certain proportion. As a quality improvement method for grouting construction, it focuses on the use of post-bonded prestressed steel. This method has more construction practices in construction, and in bridge structure, mainly by the Japan Road Corporation, examples of adoption are also increasing. In Songfan viaduct, the late bonded prestressed steel strand is used as the transverse tension bar in the bridge panel, which can not only avoid the shortcomings of grouting, but also save labor and shorten the construction period. The following is a brief description of its engineering.