Typical SAR imaging aims at the static targets, which means that target is static and radar is moving. By contrast, ISAR imaging aims at the moving targets, which means that target is moving and radar is static. When detecting the moving targets by SAR, both radar and target are moving, which shows that rhe echo of moving targets not only have the component of SAR but also that of ISAR. Generally speaking, imaging of SAR moving target usually adopts the R-D algorithm of typical SAR. But the method which combines SAR imaging technique with ISAR imaging technique, is more reasonable. Therefore, on the basis of parameter estimations, a kind of hybrid SAR-ISAR imaging algorithm, which applied to moving target imaging, is presented. The simulation results validate the effectiveness of this algorithm.