The hip joint consists of a joint head and a joint fossa, which is a ball and socket joint. The joint head is often referred to as the femoral head, and the joint fossa is the acetabulum. The head of the femur is embedded in the socket of the pelvis (acetabulum), and the head and socket combine to form the hip joint, similar to a bearing. In contrast, hip replacement or total hip arthroplasty is the replacement of all or part of the destroyed bone in the hip joint with a bionic artificial hip joint to form a new normal joint. It is a restorative surgery to relieve pain and re-establish joint motion function. In the past, hip replacement was mainly used for the elderly. Due to recent advances in artificial joint materials, which have made them more resistant to wear and tear, they are now also commonly used for advanced joint lesions in young people. 1) replacement of the hip socket (acetabulum) with an ultra-high polymer polyethylene socket; 2) replacement of the diseased femoral head with an alloy femoral head; 3) insertion of a metal stem into the femoral medullary cavity to increase the stability of the artificial joint. A thorough evaluation of the patient will be performed before the surgery, including an assessment of the patient’s disability and its impact on life, physical condition and cardiopulmonary function, to determine whether the patient should undergo hip replacement surgery. Patients will experience some degree of postoperative wound pain, but the pain can be controlled by pain pumps or pain medication, and the pain will gradually decrease, with general pain relief by three days postoperatively. Several intravenous lines need to be established to provide adequate hydration and nutrition after surgery. The intravenous line is kept until the patient is able to eat an adequate liquid diet on his own. Thrombosis is common after lower extremity surgery, so it is important for patients to prevent thrombosis after surgery. Patients are encouraged to perform exercises such as muscle stretching in bed early after surgery, which facilitates the return of blood from the lower extremities to the heart. More movement of the ankle joint while in bed also helps prevent thrombosis. A Foley catheter was inserted intraoperatively to monitor renal function and urine output. The catheter can be removed on the second or third postoperative day. Later, patients are encouraged to walk to the toilet to urinate with the help of others as much as possible. If getting to the floor is not an option, use a specially designed urinal to urinate in the hospital bed, which keeps the hip in the proper position. Patients need to stay in the hospital for observation after hip replacement and need help from others to live for a short period of time after surgery until they regain flexibility and can indeed live independently. Patients should avoid strenuous exercise after surgery. For about 1.5 months, the patient will need to use crutches or a walker to help him/her walk. The prognosis for hip arthroplasty is generally good. The surgery can relieve pain and osteoporosis symptoms and restore normal function, and most patients can move around on their own.