Acetabular dysplasia refers to abnormal development of the joint during growth due to congenital or acquired factors. Hip dysplasia, also known as unstable hip, is present during childhood but is mostly asymptomatic. As the patient grows older, he or she develops hip dysfunction, fatigue, and limited movement. If the patient comes to the clinic at a later stage, the time for conservative treatment has been lost, and it becomes a common cause of degenerative osteoarthritis or hip pain. Therefore, the adult acetabular dysplasia should pay attention to. 1, pay attention to adult acetabular dysplasia, first of all, to do early diagnosis. Many patients are young when first seen, but did not do early diagnosis, affecting the effectiveness of treatment. Because the patient’s early symptoms are not typical, there are complaints of back pain, there are complaints of easy fatigue. To achieve early diagnosis, we must have the concept of acetabular dysplasia and fully understand the diversity of clinical manifestations of the disease: some v. hip discomfort, some v. lumbago, some v. groin pain after exertion, etc. For such patients, we must take orthogonal pelvic radiographs, if we find that the femoral head is not fully covered and the CE angle is reduced (normal is 25 degrees), we can diagnose acetabular dysplasia. 2, pay attention to adult acetabular dysplasia, but also to achieve reasonable and timely treatment. Early detection of adult acetabular dysplasia, more than obvious osteoarthritic changes. At this time can be surgical treatment, explain to the patient the urgency of surgery and the danger of not timely treatment. The treatment methods are: salter surgery, lid surgery, chiari pelvic internal displacement osteotomy, acetabular rotational osteotomy and so on. The aim is to change the coverage of the hip joint on the femoral head, change the corresponding cartilage weight-bearing surface of the hip joint, eliminate the shear stress, in order to eliminate the pain of the joint and improve the function of the joint; prevent or reduce the degeneration of the hip joint, or even reverse the degenerated joint to normal, so that the patient does not replace the artificial joint or late replacement. Even for patients who are diagnosed late and have lost the opportunity of surgical treatment, we should explain the development of the disease to them and instruct them to reduce the amount of activity and postpone the time of artificial joint replacement.