Hip osteotomy is selected according to the original underlying disease of the patient: 1. Due to developmental hip dysplasia, the joint structure of pediatric patients over two or three years old has been changed bony, the structure and direction of the acetabulum and proximal femur can be changed by osteotomy surgery to restore the normal hip joint structure; 2. For adult or older hip dysplasia, i.e., DDH, due to the change of joint force line, it will cause excessive wear and tear of the articular cartilage of the hip joint, resulting in distortion of the surrounding blood vessels and nerves, which affects the patient’s life. 2, for adult or older hip dysplasia patients, due to the change of joint force line, it will cause excessive wear and tear of the articular cartilage of the hip joint, causing the distortion of the surrounding blood vessels and nerves, which will affect the patient’s life, so the patient’s life can be affected, and the patient’s life can be affected by the surgery to create an artificial neat fracture in the proximal end of the acetabulum or femur, and then carry out the internal fixation of the plate in order to restore the normal hip structure and biomechanics, which will be conducive to the protection of the residual articular cartilage and the restoration of the patient’s ability to walk. Therefore, hip osteotomy is also a clinically effective means of treatment for patients who have no serious wear and tear of the articular cartilage and no serious joint degeneration, osteotomy is also a good way to treat the disease.