Abstract: Influence of linear frequency modulation(LFM)’s center frequency and frequency modulation mismatching on pulse compression is analysed. The model about analysis of the effect of parameters detection error to SAR deception jamming is presented, which explains the effect of parameters detection error to the deception jamming against SAR and the analytic expression of parameters error on the location and resolution of the deceiving target images has been deduced. The relation between parameters error and the location and resolution of the deceiving target images is presented. The correctness of theoretical analysis is proved.