After joint replacement for femoral head necrosis, it is not exactly the same as normal people. In the early postoperative period, patients are not allowed to squat, the lower limbs can not be crossed, and cross-legged is not recommended, otherwise there is a risk of dislocation of the artificial joint. As the disease recovers and the functional exercise is strengthened, the hip joint is no longer prone to dislocation. Generally, after 2 months, the basic life of the patient is the same as that of a normal person, and the patient can lead a normal life, work and appropriate sports, but it is not recommended to carry out weight-bearing work for a long period of time or a large amount of heavy labor, or it will make the joints excessively worn and make the service life of the artificial joints shorten accordingly.