The complex environment of abdominal aorta inevitably leads to the problems of weak edges and inhomogeneities. To solve the problem, an algorithm for segmentation of aorta CT scans based on local edge features via level set is proposed. The energy function is minimized by assigning weighting factors according to their relative importance of the inside and outside of the evolving contour. The results show that the new approach is more accurate and stable and can obtain fairly satisfied effect.