Networked air & missile defense (NAMD) which is evolving in the context of networked centric warfare is the coming trend of the air & missile defense domain. Given its initial exploring phase of theories, modeling and simulation, and based on the ideology of composable modeling framework, a conceptual diagram composed of command and control, sensors and weapons networks about the structure of NAMD systems was designed, and CMFs about top level, decision, and data link were developed. Eventually, the composibility and rationality of CMFs were validated by a simulation case of NAMD systems warfare. Significant implication is revealed for modeling and effectiveness simulation of NAMD systems.