Considering that there exist many signals with nonuniform distributions and different bandwidths in the complicated electromagnetic environment, a new method is proposed for designing a dynamic channelized receiver. Firstly, a halfband filter was designed and its frequency response was compressed by zero-value interpolation to form periodic spectra. Secondly, the input signal was filtered with the interpolated halfband filter, and then the output of the interpolated halfband filter was subtracted from a suitably delayed version of the input signal. In this way, two channel signals whose spectra are complementary were obtained. Thirdly, the two channel signals were filtered respectively with the analysis filter bank to realize the uniform channelization. Finally, according to the energy detection of sub-channels, the outputs from adjacent sub-channels, which belong to the same signal, were treated as the input of the synthesis section, and the corresponding synthesis filter bank was designed to extract the desired signal. Theory analysis and simulation results verify the validity of the new method.