The paper focuses on the strategy of improving the large amount of concurrent processing during online course selection, based on the existing network condition of Yunnan University of Finance and Economics. With server load balancing by F5_BIG_IP LTM, it can solve the problem that overload server can't response to the concurrent access of a large number of students in the course of real-time course selection. This architecture can greatly solve the problem of network congestion coursed by concurrency access in the process of actual practice. Load balancing technology provides a reliable and stable architecture for increasing Web service application. And it provides a reference for real-timely dealing with the congestion problem of online concurrent access.