For the purpose of analyzing the blanket jamming effect of the dense deceptive targets, a new jamming method for improving the jamming effect of the dense deceptive targets is proposed.Power distribution of multiple deceptive targets after pulse compression, generated by intermittent sampling of Linear Frequency Modulation (LFM) radar signals, is analyzed firstly.Then, the influence of dense deceptive targets jamming on radar detection of CA-CFAR is analyzed.The ideal jamming effect is achieved by adjusting related jamming parameters based on power distribution of multiple deceptive targets.The simulation results show that this method can improve the jamming effect greatly.