Objective：To investigate geometric features of the acetabular anterior column, and provide basis for placing acetabular anterior column reconstruction plate. Methods: Fifteen adult pelvic specimens were harvested in this study. Serial cross-sections of the anterior column were performed and analyzed. Results: The shape of the transverse section of the anterior column from the obturator groove to the anterior superior iliac spine appeared as a subtriangle. The angle between the tangent line from the point about 10.0mm from the pelvic brim and the upside of the anterior column changed from (72.6±4.8)° to (44.6±4.7)°，and then enlarged to (82.4±3.2)°， however, the smallest angle neared to the iliopubic eminence. Conclusions： From the obturator groove to the anterior superior iliac spine，the thickness and the shape of the anterior column is different. Dealing the shape of transverse section as the triangle can help to judge the safe entry angle of inclination and the safe depth of the screw path.