One leg is long and the other is short, which may be caused by lumbar scoliosis, pelvic tilt, femoral head necrosis, hip dislocation, hip dysplasia, etc. After clarifying the cause of the disease, adjustments can be made through treatment of the primary disease, rehabilitation exercises and surgical therapies. For one leg is long and the other is short due to lumbar scoliosis and pelvic tilt, it is necessary to actively treat the lumbar spine or pelvic diseases, and on the basis of the treatment, restore the physiological curvature of the lumbar spine and improve the pelvic tilt by means of rehabilitation exercises, such as enhancing the strength of the lumbar and abdominal muscles and lumbar spine traction. If there is femoral head necrosis, hip dislocation, hip dysplasia, which is difficult to be corrected by rehabilitation exercises, human hip replacement surgery will usually be taken to correct the situation and rebuild the acetabulum. When one leg is long and the other is short, the specific adjustment should be made by the doctor after evaluating the specific situation and formulating an appropriate plan.