Abstract: This paper presents a load balancing peer-to-peer network architecture for VoIP applications, which is based on Chord protocol, and balances the user registrations among nodes by means of changing node identification dynamically. According to two thresholds of user registration loads, nodes check and balance user registration loads with two different methods, therefore network bandwidth overhead are reduced by depressing the frequency of loads transferring between nodes. Simulation result shows that, our peer-to-peer network architecture has less maximum load of single node and load mean square deviation of overall nodes than Chord. Peer-to-peer network implemented with the architecture in this paper, employ less resources in single node, and is suitable for deployment on embedded VoIP terminals with limited resource.