Abstract: In order to study the safety and reliability of UAVs in the battlefield electromagnetic environment, the shielding effectiveness of the UAV housing was simulated, and continuous-wave electromagnetic radiation system was established in the open field environment, radiation effects experiments were carried out for the UAV machine and the core components transceiver portfolio of communication link system. Simulation results show that, under 10MHz-1GHz continuous wave irradiation, the shielding effectiveness of UAV housing is low, about 10dB; The experimental results show that, in some frequencies or frequency band, UAV data link system will appear the phenomenon of unlocked, UAV cannot carry out efficient data transmission with ground control station, and different polarization direction of radiated electromagnetic field leads to different values of the electric field threshold for the communication link system unlocked. The analysis show that the main electromagnetic energy coupled channel are UAV antenna and transmission through UAV housing.