Abstract: Big data is the commanding height of a new round of scientific and technological revolution, whichis a powerful grasp to fully implement the intelligent railway strategy of the China Railway. On the basis of theaccumulation in the early stage, the railway big data is in the stage of deepening application. This paper analyzedthe core value of big data, introduced the overall blueprint of big data application of railway, analyzed the big dataapplication of the railway administration, summarized the existing problems and forecasted the future work. This research issignificant in further clarifying the working ideas and grasping the development direction of railway big data.