From 1996, in the 13 fractures of the acetabulum surgically treated in Kyung Pook National Hospital and Sae-Myung Orthopedics, cerclage grip system(DALL-MILES) have been used as reduction and fixation tool. Cerclage cable inferted through the greater sciatic notch to a point just cephalad to the anterior inferior spine was greatly helpful for both reduction and internal fixation of thirteen complex acetabular fractures. This technique is especially useful when the fracture line extend into the greater sciatic notch. This is true of high posterior column fractures that extend up into the upper part of the notch, transverse fractures that have an anterior or posterior limb that is high, and both column fractures through ilioinguinal approach with T- extension. Reduction was achieved to within 3mm in 11 cases and 6mm in 2 cases. This reduction was maintained until nuion. The technique may contribute to fracture stabilization, but supplementary fixation was added in 12 patients with curved reconstruction plate over pelvic brim and posterior column in 1 patient.