ISIS and BGP are wildly used routing protocols, after the basic concepts of them are expounded, the drawbacks of network systems based on traditional IGP protocols were explained subsequently. To overcome the above drawbacks, a network model based on EBGP and ISIS was proposed innovatively. This new network model has flexible structure, strong performance and superior redundancy, what’s more, it supports rich communication applications, so this model is suitable for the giant networks. Simulation experiment indicates this model based is more optimal than the model based on IBGP and OSPF protocol. Finally, a real network system was constructed based on this model, which runs stably and all network parameters are normal.