The key problems of volleying air combat simulation under electronic support are researched against the new combat modes and objects in future air combat. The air combined formation consisting of fighters, unmanned aircraft and electronic warfare planes is the main study object. With object-oriented technology involved, the use case diagram and class diagram of UML are used to analyze the static function structure of volleying air combat and the interactive model, activity transition model are established through the sequence diagram and activity diagram. The combat flow is explained systematically. Meanwhile, the modeling of electronic countermeasures is just the point. Finally, a simulation system of volleying air combat is realized. Simulation experiment shows that this simulation system can provide the experiment platform for combating efficiency evaluation of aviation electronic countermeasures system.