Abstract: The requirements of LTE network applied in Shanghai urban rail transit fully automatic operation lines are analyzed, and new challenges against network architecture caused by LTE network comprehensive bearing are demonstrated. In order to solve these problems, based on the base station sharing technology and sharing mode, a new rail transit LTE network architecture is proposed to realize the sharing of base stations in rail area by using MOCN mode and shared carrier frequency, and accessing to both EPC for data service of each line and EPC for broadband trucked communication. According to project application of this LTE network architecture, the composition and system configuration of LTE network are explicated, thus it satisfies the radio transmission requirements of different services and improves feasibility of the system.