Abstract: The feasibility of the reverberation chamber using frequency stirring was analysed in theory. The field uniformity and statistical characteristics within the reverberation chamber were simulated and tested. And the application to measuring shielding effectiveness was investigated. The results show that the field uniformity could be got by frequency stirring, the electric field right angle components obeyed Rayleigh distribution, and the field uniformity and statistical characteristics became better with the frequency rising. The shielding effectiveness of small enclousres with an aperture was tested in a frequency stirring reverberation chamber, and the SE was about 15 dB, which was fit with the test results of the mechanical stirring reverberation chamber.