The typical service life of domestic knee joints ranges from 10 to 15 years. The service life of domestic knee joints is affected by many factors, such as the age of the patient, the amount of exercise, weight, surgical methods and the patient’s own condition. If the patient will have wear and tear in the process of exercise after replacing the artificial joint, the general use of time ranges from 10~15 years. If the patient frequently exercises strenuously in daily life, the service life of the artificial knee joint will be significantly shortened. Nowadays, the domestic knee joint replacement has been mature, patients can carry out early functional exercises under the guidance of doctors, such as early standing, walking, etc., to avoid muscle atrophy and thrombus formation. After the operation, patients should pay attention to regular checkups to monitor the changes of their conditions, and go to the hospital in time when there are symptoms of local discomfort such as redness, swelling, and fever.