Femoral head necrosis is a serious, common disease that endangers human health and causes patients to gradually lose their ability to work and live on their own. Causes: At present, femoral head necrosis is mainly caused by various causes of reduced blood supply to the femoral head or even lack of it. It is generally believed to be related to long-term use of hormonal drugs, heavy consumption of poor quality alcohol and trauma-induced femoral neck fracture and hip dislocation. Performance and treatment: Early stage of femoral head necrosis: the performance is soreness of the diseased hip, pain is obvious when walking, and the movement of the diseased hip is not restricted. At this time, you should go to the orthopedic clinic in time to take hip X-ray. At this stage, the impact of the femoral head on the X-ray can be normal or show local high-density shadow. The shape of the femoral head has not changed and the hip joint gap exists. To confirm the diagnosis, MRI of the hip can be done if necessary to facilitate early detection of femoral head necrosis. Isotope bone scan and CT of the hip are not very helpful for its early diagnosis. 38-year-old male, early stage of head necrosis, before taking medication 2 years after taking medication, the necrotic area was reduced 3 years after taking medication, the bone density returned to normal treatment is mainly based on conservative treatment. First of all, we should support the abductor on the sick side to reduce the weight-bearing of the sick hip; meanwhile, we should take some drugs that promote bone healing, such as Jianbao Shengwan, to promote bone growth, increase bone density, restore blood flow and accelerate the repair of necrotic bone. Middle and late stage of femoral head necrosis (deformation stage): The pain of the diseased hip is obviously aggravated, with resting pain or nocturnal pain, and the activity of the diseased hip is obviously restricted, and the quality of life is obviously reduced. At this stage, X-ray shows that the femoral head becomes flattened, the hip joint gap disappears and bone spurs grow. At this time, both isotope bone scan and hip CT can detect evidence of femoral head necrosis. In the middle stage, palliative surgery can postpone the artificial hip replacement, but the effect is not certain. Palliative surgery includes femoral head drilling and decompression, rotational osteotomy, and vascularized bone grafting. In advanced stages, artificial hip replacement surgery is performed to replace the destroyed hip joint. This surgery has been performed for more than 30 years. At present, with the improvement of bioengineering technology, artificial hip replacement has become a routine operation for the treatment of advanced femoral head necrosis, and the efficacy of the operation is certain. The literature reports that the success rate is more than 95% ~ 98% more than 10 years after surgery. Good joint material and manufacturing process, excellent surgical technique, active postoperative functional rehabilitation, and regular postoperative follow-up are indispensable prerequisites for high success rate of artificial hip joint.