Abstract: Currently, domestic railway passengers have an increasing demand for intercity rail transit transportation. To meet the practical needs of rapid entry and exit at stations and convenient payment of intercity railway passengers, the article designs an smart train ride QR code system for intercity railway. This system realizes offline dynamic generation and parsing of train ride QR code as well as intelligent identification of passengers so that passengers can enter and exit the station quickly by scanning the QR code via the railway 12306 Alipay applet, greatly improving their travel efficiency. In addition, relying on the payment and settlement capabilities of the railway electronic payment platform and the payment and risk control capabilities of Alipay financial products, multiple encryption and verification of payment transactions and improved transaction reconciliation and difference processing are realized to reinforce the security of password-free withholding of passenger electronic payment accounts and Alipay advance payment guarantee, which not only ensures the conveniency, security and risk controllability of passenger payment, but also ensures the accuracy of China Railway Group's transportation revenue. The system has been successfully applied in China Railway Guangzhou Group Co., Ltd., creating a fast and convienient travel experience for railway passengers who can board the train first and pay later, promoting the transformation of railway passenger service modes and the improvement of railway passenger service levels.