Abstract: For lack of macro-control parameters and convenient solution of tactical communication network, by classifying combat information network into three hierarchies which are core hierarchy, middle hierarchy and user hierarchy, an evolving network model of combat information network has been proposed. The degree distribution of evolving network with adjusting parameter is solved based on mean-field theory. Clarifying the power law of combat information network is between 2 and 4 on theory, demonstrating the number of arriving node on average in a unit time has no effect on power law. Simulating the characteristic parameters, the distribution of average path length and clustering coefficient under different preferential attachment probability presents different principles