Abstract: This paper is proposes to detecting radial moving ground targets from SAR image. Radical moving targets have focused image just as fixed ground clutters. The algorithm for detection and parameter estimation of radical targets has three steps. The first step isolates the SAR image frequency spectrum to positive band and negative band, then uses IFFT transform to reform two images. The second step subtracts the two-look image amplitude, It offers an approach of suppressing ground clutters and simultaneously indicating the true location of the slant-range moving target image. Finally the radical ground speed of the moving target is carried out by the estimating its Doppler centroid. This combined method is implemented by using real clutter data combined with simulated moving targets. Typical computer results are presented, which illustrate this technique＇s availability.