From the benefit of network reliability, the essay analyze and contrast the reliability of Ethernet Ring Network. According to campus network users’ telecom requirement on the network performance, the essay, combining with existing equipment situation, puts forward to correct my school LAN topology structure by EAPS technology. The results show that: in the campus network environment, the reliability of adopting EAPS technique to construct Ethernet ring network is superior to other loop solution and it satisfies the users’ requirements to network telecom level. The method, being easy to implement and convenient to reconstruct in the existing network environment and good in practice, can be extended to the design of large-scale campus network reliability.