Abstract: In order to improve the service level of China-Laos railway passenger transport and facilitate passengers to purchase tickets, this paper designed the China Laos railway Internet ticketing and reservation system. Based on the service-oriented layered design concept, the paper elaborated on the overall architecture and logical architecture of the system, with a focus on key technologies such as distributed cache processing, data synchronization mechanism, asynchronous queuing transactions, payment localization adaptation, and automated monitoring of message notifications, which solved the technical challenges of real-time balance ticket queries, asynchronous queuing transactions, and distributed system data consistency that require a large number of high concurrency issues from users. It not only improves the travel ticket buying experience of Laos passengers, but also improves the passenger transport service quality and operation organization efficiency of the China-Laos railway, and promotes the development of the China-Laos railway in the direction of digitalization, networking and service.