Abstract: Based on the analysis of the definition, elements and characteristics of visualization technology, combined with the visualization technology classification and application scenarios, this paper summarized and elaborated the data visualization research of railway travel data, and introduced some application cases, including the visualization of OD passenger flows, railway travel hot spot data and railway passenger volume analysis. At the same time, the paper summarized and prospected the development of visualization applications in railway, and indicated the importance of visualization technology in the development of railway information.