In order to enhance the anti-jamming capability of aeronautic swarm tactical network in complicated electromagnetic environment, the simultaneous transmitting and receiving based cognitive anti-jamming radio was employed in aeronautic swarm network, and the improved energy detection method was proposed to jamming sensing. In the case of single and multi-jammer, the closed expression of false alarm probability was derived, the false detection probability and the optimal decision threshold of jamming sensing. Simulation results show that jamming sensing performance can be improved by adjusting the parameter p of the improved energy detector.