This paper presents a novel and efficient real-time multi-target imaging technique.First

the motion parameters of each target is estimated by applying a new time-frequency technique（the modified short-time Fourier’transform）to the received echoes. Then

motion compensation is performed to get the image of the targets.Although the image is poor

the contour of target is distinguishable one from another.So we can get the signal of individual target by windowing. After applying a new ISAR motion compensation technique which called scattering centroid tracking to the windowed signal

we finally obtain the high-quality image of every target. Compared with the parameterbased （such as MLE）compensation

the proposed technique requires much less computation and is easy for implementation. Computer simulations have shown the effectiveness of the technique.