Prefabrication, transportation, hoisting and on-site assembly of components have high requirements. The prefabricated piers and cover beams shall be of accurate size and shall be delivered after being pre-assembled in the factory. During the construction process, the assembly accuracy of the components is strictly controlled, and detailed and feasible connection schemes and grouting schemes are formulated to ensure the quality of the assembly. After the grouting is completed, the curing is carried out in time, and after the strength of the slurry reaches the design strength, the temporary support device is removed. Before the construction of the bridge beam body, the integrity of the pre-assembled components and various mechanical properties are tested. After the qualification, the next step of the construction is carried out.