Modern military operations are becoming increasingly reliant on communication network and its connectivity. In order to help Tactical Communication Network (TCN) manipulators in operating those advanced communication equipments and related network management software, a type of simulation training system for TCN is presented in this paper. Networking simulation was introduced into the system to provide necessary implementing environment. The system to accomplish the task was named Networking Simulator (NETSIM) federate, which serves as a bridge to combine TCN network management training and equipment operation training. To realize NETSIM, the network’s abstract model of simulated TCN was analyzed and the three-layer program model framework was put forward. Key issues for NETSIM development were discussed in detail and appropriate solutions were also provided. The primary application of the research shows its scientificalness and feasibility.