将直角坐标系引入双环网络,通过直角坐标系,系统研究双环网络G(N;r,s)的容错路由,提出将双环网络和直角坐标系结合起来,使节点可视可控.基于直角坐标系研究双环网络G(N;r,s)的容错路由,解决多节点故障时源节点如何快速建立和目的节点之间的路由.首次提出故障节点封闭区和节点逃逸区,在此基础上提出多节点故障时容错路由最优算法,并用实例验证算法的正确性. The Cartesian coordinate system is introduced into the double-loop network, and the fault-tolerant routing of the double-loop network G (N; r, s) is systematically studied by Cartesian coordinate system. It is proposed that the double loop network and Cartesian coordinate system are combined to make the nodes visible and controllable. This paper studies the fault tolerant routing of double ring network G (N; r, s) to solve the problem of how to quickly set up the source node and the routing between the destination nodes when the multi-node fault occurs. Multi-node failure fault-tolerant optimal routing algorithm, and use examples to verify the correctness of the algorithm.