Abstract: Based on the analysis of linear frequency modulation and Barker code combined modulation signal pulse compression, the ordinary methods of side-lobe suppression with weighted Hamming window or Hanning window were compared and researched. Finally, a novel method is proposed. For the method, weighted Kaiser window is utilized in both the transmitter and receiver. Compared with weighted Hamming window which ratio of main-lobe and side-lobe reaches -42 dB and weighted Hanning window which ratio of main-lobe and side-lobe reaches -31.4 dB, double Kaiser window method can let the compression ratio reach above -50 dB and shows its better side-lobe performance. After the pulse compression, its main-lobe broadening range is relatively small.