Aiming at the comprehensive noise jamming threat faced by air defense early warning, an optimization model of air defense radar cooperative allocation is established. Based on the analysis of the traditional anti-jamming detection range model of air defense radar, the analytical models of detection range under the conditions of long-range suppression jamming, accompanying support jamming and self-defense jamming are given, and the general detection range model of radar under the condition of comprehensive noise jamming is summarized and established. A solution method combining ergodic search and golden section method is proposed and verified by typical examples. The example analysis results show that the model and method are effective and feasible, and can significantly improve the anti-noise jamming ability of air defense radar network, which has a certain reference significance for the research and practice of air defense radar network deployment.