Aiming at the highly complex and dynamically changing characteristics of the battlefield during the implementation of the tactical Internet, the network effectiveness of the tactical Internet is studied from the perspective of the dynamic field of view. Based on the OPNET simulation tool, the typical tactical Internet is networked. The model has been studied, and a tactical Internet network simulation model has been constructed from the perspective of business performance. Finally, the simulation scenario is designed and simulated according to the operational requirements. The results show that the constructed simulation model can solve the problem of dynamic evaluation of the network effectiveness of the tactical Internet in the combat implementation phase.