InverseSyntheticApertureRadar(ISAR)isanimportantmeansfortargetclassification,recognition,identificationandmanyothermilitaryapplications.AsimulationmodelofISARsystemisestablishedafteranalyzingtheprincipleofISARimaging,andthenseveralECM(ElectronicCounterMeasurement)techniquesarestudied.Simulationexperimentsaredoneonthebasisofsuchresearch.TheexperimentalresultoftheresearchcanbeusedforECMequipment.