A networked multiple unmanned aerial vehicles cooperative operation system architecture is proposed under the condition of the "network-centric" warfare model, and taking electronic jamming unmanned aerial vehicle and unmanned combat aerial vehicle (UCAV) mixed formation cooperative operation as an object of study. Aimed at the problem of dynamic target assignment in multiple unmanned aerial vehicle cooperative air combat, a new threat assessment model is established based on the missile launching envelope analysis, and in consideration of the effect of electronic jamming, a target assignment model is established, and a new target assignment method is presented based on decentralized auction facility. The simulation results based on different combat scenarios indicate that the algorithm is adapted to the system's characteristics of distributed computation, presents the allocation scheme close to the ideal optimal effect within the restraint time, and is superior to the conventional methods in reliability and real-time effect.