Abstract: In order to restrain the uncivilized behavior of railway passengers, optimize railway passenger service and respond to the construction of national credit system, this paper put forward the construction of railway passenger credit system. The paper described the logic framework and network framework of the system. By using the technologies of big data acquisition, storage, passenger credit index algorithm, personal credit big data analysis, data interaction of credit sharing platform, and data security encryption interaction of train –ground, the system could collect and store credit data of each passenger, form the passenger statistics and analysis report of the system, provide credit interface service of the railway industry to the country. The railway passenger credit system is helpful to the fine operation of railway passengers and the restrictions on uncivilized passengers, has a certain reference to the construction of the national credit society.