Aiming at the problem that the data link of the unmanned aerial vehicle（UAV） data link is susceptible to electromagnetic interference

we objectively analyzed the electromagnetic sensitivity of continuous wave interference signals of different frequency and power. Taking the data link system of UAV as a research object

we experimentally investigated the continuous wave jamming signal injection and the mechanism of loss of lock in case of equivalent continuous wave interference. The sensitive band and the threshold of the interference signals were obtained through the experiments of electromagnetic interference. Moreover

we analyzed the communication interruption mechanism of data link. Experimental results show that

for the same frequency interference signals

when the interference signal injected into the front of the receiver is-83.2 dB

data link communication may be interrupted.The results lay a good foundation for the analysis of data link interference prediction.