Abstract: Redundant design of uplink vice telecontrol is important to ensure UAVs battlefield survivability. In order to test the reliability of the UAVs vice telecontrol datalink system under continuous wave radiation environment, a test platform of UAV continuous wave radiation is established based on continuous wave radiation emission system. The typical effect of unlock is regarded as the basis of interference. The radiation effect on vice telecontrol datalink system is carried out to analyze the effective mechanism of unlock and key coupling path of interference through electromagnetic simulation and injection method. The result shows that, in some sensitive frequency points, vice telecontrol datalink will appear disruption on communication, that performs unlock at the threshold of 0.098V/m. Besides, the electric field threshold of unlock changes with the polarization of the radiation field. Through electromagnetic simulation, it is concluded that the antenna is the main interference coupling path of UAV vice telecontrol system. Analysis shows that harmonics of unlock points contact with the band of UAV. Electromagnetic energy is coupled into the UAV internal transceiver combination through the front door. When the signal to noise ratio (SNR) reaches a certain extent, a demodulated output of bit error rate (BER) is large enough so that the communication interrupts and appears unlock.