Congenital hip dislocation has 3 main malformations, namely acetabular dysplasia, dislocation of the femoral head and malformation of the proximal femur development. The Salter pelvic rotation osteotomy is suitable for cases with no dislocation of the femoral head and an acetabular index of <35°, and the age of <6 years. osteotomy (also called peri-articular capsule osteotomy). Dislocation of the femoral head requires a T-shaped incision of the hip capsule, removal of scarred fatty tissue and hypertrophied round ligaments in the acetabulum, followed by overlapping tight sutures to close the capsule. With the above measures, if the femoral head is stabilized in the center of the acetabulum, the femoral head will be shaped and developed within the acetabulum; however, because the acetabulum and femoral head are poorly developed in patients with congenital hip dislocation, the femoral head is also prone to outward migration or even re-dislocation after surgery.