Abstract: Seats of automatic load balancing was a kind of method to share and allocate the seats resource automatically in Railway Ticketing and Reservation System. It connected and managed lots of servers resource, storage resource, database resource in the railway system to form a huge resources system, provide services for intelligent prediction and dynamic adjustment of the seats. This paper mainly introduced the concept, characteristics, key technologies of automatic load balancing about the seats and analyzed the application in China Railway Ticketing and Reservation System.