Abstract: Ensuring traffic safety and improving transportation efficiency is the ultimate goal of railway traffic command and real-time acquisition of high precision position of running trains is essential to traffic safety. Based on the project of electronic delivery of train list information that has been implemented across CHINA RAILWAY, it is proposed to make use of the train driver's handheld terminal equipped in this project to realize real-time whole-railway train tracking and safety early warning system by using satellite positioning, mobile IoT and fusion data technology. This system can offer visualized dynamic monitoring picture of train tracking on railway network diagram and graded safety warning according to effective braking distance of the trains.