Expansion joints are a crucial component of bridges, and their installation must be strictly monitored. How should the construction and installation of expansion joints be carried out? To ensure the quality of the construction, meticulous workmanship is essential. Their primary function is to regulate the displacement and connection between the superstructure, caused by vehicle loads, environmental characteristics, and the physical properties of bridge construction materials. The quality of installation directly impacts driving comfort, safety, bridge service quality, and lifespan. Many issues with expansion joints occurring later are due to problems during the installation process.