The treatment of acetabular fractures has always been a difficult and key point in orthopedics. Acetabular fractures are mostly high-energy violent injuries with significant fracture displacement and extreme instability of the acetabulum. If patients do not receive timely and correct treatment, the disability rate is extremely high. The choice of the surgical approach is the key to the treatment of acetabular fractures. Especially for complex acetabular fractures involving the anterior column and anterior wall, it remains a challenge for trauma orthopedic surgeons. Although the anterior ilioinguinal approach described by Letournel has been widely used and has become the standard, classic approach. However, this approach is anatomically complex, with more injured structures, more bleeding, and a long learning curve. It is also difficult to expose and reposition anterior acetabular wall fractures that are more medial, and the quadrilateral body of the medial acetabular wall cannot be exposed and fixed under direct vision; in addition, due to the restriction of the inguinal ligament, the anterior hip capsule and hip joint cannot be exposed through the iliogastric approach. For the treatment of anterior acetabular column and anterior wall fractures combined with femoral neck fractures and intra-articular fragmentation, a single ilioinguinal approach cannot complete the operation. Compared with the classic ilioinguinal approach, we have learned that the inferior ilioinguinal approach can be separated downward along the lateral aspect of the iliopsoas muscle, which can significantly increase the mobility of the iliopsoas muscle, and the inguinal ligament together with the iliac osteotomy block can be pulled medially and superiorly, which can significantly expand the exposure of the lateral and medial windows The lateral gap can be separated lateral to the iliopsoas muscle downward to expose and distract the rectus femoris muscle and expose the anterior hip capsule, allowing for the management of femoral neck fractures or intra-articular fragments, significantly expanding the indications for surgery; the incision does not require opening and repairing the inguinal ligament and external oblique abdominal muscle, and the time to open and close the incision is significantly shorter than that of the The incision does not require opening and repair of the inguinal ligament and external oblique abdominal muscle, and the time to open and close the incision is significantly shorter than that of the classical iliac inguinal approach, and the possibility of inguinal hernia is reduced. From May 2008 to January 2011, we treated a total of 23 cases of acetabular fractures with anterior involvement of the anterior and medial walls or hip structures by using the subiliac inguinal approach or the combined subiliac inguinal + Kocher-Langenbeck approach, and some cases achieved satisfactory results through the follow-up of nearly two years. In addition to our hospital, we also carry out this technique in Xinyi, Shuyang, Gaoyou, etc. in our province and Chuzhou, Anhui Province. In July 2010, we participated in the Yangtze River Delta Orthopaedic Forum and received favorable comments, and published an article in the Chinese Orthopaedic Journal of Trauma in October 2010. At present, further anatomical studies of this approach have been completed in the anatomy department of our university, and the paper is to be published. There is no similar report on the treatment of acetabular fracture by this approach in China except our hospital, and only Farid YR reported 7 cases in J Orthop Trauma in April 2008 and Seyyed HHR reported 17 cases in Hip Int in 2010 internationally.