Abstract: Big data technology has been widely applied in most of industries, and achieved remarkable achievements. However, the application of big data technology in railway passenger transportation is incipient. This article focused on the application of big data technology in railway passenger transportation management, marketing management and service quality. A series of application scenarios of big data technology in railway passenger transportation marketing, railway operation, service quality were presented. Some countermeasures about the big data construction in railway passenger transport were put forward.