Abstract: In this paper, a multi-region segmentation method for synthetic aperture radar (SAR) images based on a parametric model is proposed. The modified Edgeworth expansion series method is employed to fit the statistical information of the SAR image adaptively. Since the estimation of the probability density function of the SAR image is not required, it is more suited for the multi-region segmentation. Based on the number of the segmentation, the modified Edgeworth expansion series is introduced to the corresponding energy functional model and then the solution based on the level set and its numerical method are developed, thus attaining the segmentation. The experimental results indicate that the higher accuracy of the segmentation is achieved by the proposed method compared with those by the other methods, and the proposed method is more suitable for the multi-region segmentation.