The approach of acetabular posterior column fracture has always been one of the hotspots in orthopaedic trauma research. At present, the conventional "posterior approach" and "anterior and posterior combined approach" have their own advantages and disadvantages. With the deepening of clinical and basic research, more and more surgeons choose the internal pelvis approach, which has achieved good results. According to letournel Judet classification system, acetabular fracture is divided into anterior column fracture, posterior column fracture, posterior wall fracture, anterior wall fracture, transverse fracture, anterior column plus posterior half transverse fracture, transverse plus posterior wall fracture, posterior column plus posterior wall fracture, T-shaped fracture and double column fracture.