When municipal bridge and metro station are jointly built, the structural safety and normal use of the two different structures must be considered, and the structure can also be reasonably stressed. Two schemes of "connection of low transfer beams" and "bridge pier and station roof consolidation and partial replacement" are compared, and the bearing capacity, deformation and seismic capacity of each structure are analyzed through a threedimensional stratumstructure model. The research results show that it is difficult to design and construct the integrated structure with "low transfer beam connection scheme", and the transfer structure needs to be inspected and maintained during operation period; the integrated structure can be carried out using "bridge pier and station roof consolidation and partial replacement scheme". Such problems are effectively avoided, and the stress of the station slab, wall, column, and other structures is improved compared with the "low transfer beam scheme". The bearing capacity and deformation of each structure meet the requirements.