Abstract: In order to study the shielding effectiveness of the unmanned aerial vehicle(UAV) enclosure, based on the numerical simulation software CST, the calculation model of the UAV enclosure was established, and the influence of electromagnetic wave radiation direction and polarization mode on the electromagnetic field distribution of the UAV was analyzed, the variation of shielding effectiveness with the electromagnetic parameters of the enclosure material was obtained. The method of testing the shielding effectiveness of the UAV enclosure using the frequency stirring reverberation chamber was proposed, the test procedure was given and the test system was built. The experimental results show that the method was effective. The results show that the frequency stirring reverberation chamber could get the statistics of the electromagnetic field in the enclosure of the UAV, and the shielding effectiveness of the enclosure in the 1-10 GHz band was about 8-10 dB. The probability of shielding effectiveness test results with deviation less than 3 dB of different measurement positions was 94%.