Abstract: Proposes a destruction-resistant routing algorithm based on ATM (Asynchronous Transfer Mode) technology in LEO/MEO networks, of which the satellite network is virtualized as a fully connected network and divided into several clusters that can be regrouped according to satellites' position. The real-time topology information within a cluster is maintained by the clusterhead. When some intersatellite links fail, the clusterhead will try its best to rebuild the broken VPC (Virtual Path Connection) within the cluster, and, when fails once more, the clusterhead will diffuse the request for rebuilding VPC and the topology information on its own cluster to its neighboring clusterheads, so as to rebuild a VPC within a larger extent of known topology. The simulation result on Iridium system model shows that the diffused destruction-resistant routing algorithm can not only make the system stronger by avoiding the broken ISLs but also greatly reduce the path-finding overheads in comparison with OSPF (Open Shortest Path First) algorithm.