Objective To set up three-dimentional reconstruction of acetabulum bone structure from CT scanned image in computer with sofeware of CAD. Methods CT images of 40 normal adult boney acetabula were obtained and processed with the algorithm of histogram-threshold segmenting and Kirsh boundary detection to get a binary contour image.The contour of scanned acetabulum were then used for three-dimentional reconstruction with CAD software. Results The computerized 3-Dreconstuction of acetabulum bone structure appeared to mimic the real anatomy of acetabulum. Conclusion Methods proposed in this paper can be used with high accuracy and reliability for further scientific study.