Abstract: Although the scatter wave jamming can get much more jamming information than the conventional jamming methods, its jamming power is less than the latter. So the scatter wave jamming method to ISAR based on towed jammer is presented in this paper. Regarding the jammer and ISAR as the transmitter and the receiver of the equivalent bistatic ISAR, the model of the ISAR scatter wave jamming is discussed, and the jamming effects are analyzed in detail. Research results show that the jamming method can produce false image deceptive jamming or unfocused image barrage jamming according the difference of the repeater time delay, and can be easily realized. So it is an effective means for jamming the ISAR imaging.