Due to the problems of the urban planning, and the reconstruction of the old and new cities, it is inevitable that the newly-built municipal engineering interweaves closely with the construction of rail transit. The problems of construction time sequence to be found in time and coordinated with the municipal infrastructure in the early construction stage of urban rail transit can effectively promote the construction progress of urban rail transit and reduce the hidden safety problems between the structures. According to the relative position relationship between the proposed road and rail transit, Midas/GTS finite element method is used to analyze the adverse effect caused by the co-construction time sequence of rail transit and municipal engineering through an engineering case, and to evaluate its safety.