Multiple false-target images deception is the thorny point in the jamming against broad-band imaging radars. A jamming approach of applying pulse separation is proposed and the retransmission the usual LFM signal of imaging radar is presented. Combined with the scatter-wave jamming model, the imaging of the jamming signal was expounded, and the ways to achieve a train false-target images along the down-range were analyzed. Based on the divided number and the retransmitted order, the number and the resolution of false-target images were described. Finally, the simulation results are presented and addressed. This work is helpful to the deception jamming against imaging radars.