Network-in-the-loop is the direction that the military training simulation is advancing forward. Dynamic networking modeling is the key issue for constructing the network-in-the-loop training simulation. For this purpose, the fundamental architecture for the network-in-the-loop training simulation was analyzed and presented. Several features of dynamic networking modeling were researched. Based on a general view of the network, a set of networking models suitable for the network-in-the-loop training simulation were constructed, including the aggregated vehicle node model and latent link model. Now, these models are working well in a certain training simulation.