Synthetic Aperture Radar (SAR) imaging is the basis for tracking maneuvering target

the traditional radar imaging schemes are established based data fusion and image registration

when the non similarity characteristics of moving targets have fracture edge

the SAR imaging performance is bad for the fast moving target.The iris edge contour segmentation technique is introduced

a kind of SAR radar imaging method is proposed based on iris edge function calculation and region segmentation of gray level profile curve.The model of synthetic aperture radar echo is constructed

evolution equation of edge function of iris contour segmentation is obtained

and accurate SAR radar imaging is obtained.SAR imaging simulation is taken with 4kinds of high-speed flight targets

the results show that the algorithm can avoid imaging defocusing resulted from the distance dispersion and Doppler time deviation

edge feature can be extracted comprehensively

imaging resolution is high.It has better application value in the field of radar target recognition.