Based on the classical scale-free network model (BA model), this article designs a adjacent network of which key nodes are constructed to be like the structure of rotary interchange, and puts forward a method of the topology optimization for military communication networks by redundant links, and has a research on the arithmetic of the topology optimization. The method proposed are simulated by matlab. The results of the simulation show that the method can well improve the invulnerability of military communication networks, which has less influence on the network.