1, life conditioning (1) lying in a hard board bed, the room should be cleaned up excess goods, to ensure that the room is spacious, no debris on the ground, to facilitate the use of walkers to complete the functional exercise. You can take care of yourself after being discharged from the hospital. Showering is allowed 3 days after the wound is removed, but it should be done while sitting on a seat with armrests. After showering, anti-social society should dry the floor before walking to prevent slipping and spraining the soft tissues of the knee. Usually do not wear slippers to prevent walking inconvenience or tripping, it is best to wear thick-soled shoes. There should be handrails on both sides of the toilet to make it easier to get up and sit down. Wake up at night should turn on the light and then eye bed, the bedside of the best hair to put a small table, will be handy items on it, easy to get. According to personal preferences for recreational activities, such as reading, chess, watching TV, but the sitting time can not be too long, often stand up activities or bed rest for a while. Gradually increase the healthy side of the first step on and then use the handrail to maintain balance, so that the weight will not fall on the affected limb, not the floor with the opposite of the stairs, the affected limb first step out. (2) If you are sitting in the office, you can go to work 8-12 weeks after the operation. If you have a knee replacement on one side (the left side), you can drive a car, take a bus or ride a bicycle to work at this time, but you must get the doctor’s permission to do so. No heavy labor related to weight bearing. In the future, avoid strenuous exercise, such as basketball, volleyball, hiking, running, you can walk, swimming, bowling, can complete the housework, shopping. 2.Special care (1) Pay attention to the position of the affected limb: in the early stage after knee replacement, when lying down, the affected limb should be elevated above the heart level, and a pillow should be put under the affected limb to promote blood circulation and facilitate swelling. Keep the joint in straight position when resting in bed to prevent flexion deformity. To prevent external rotation of the swelling, because the external rotation position of the prosthesis compression of the lateral knee, easy to cause peroneal nerve compression, resulting in injury, especially the elderly slow reaction, pay attention to the affected limb sensory, motor changes, such as bunions can not be upward, the lower limbs of the weakness and numbness, we must consult the doctor in a timely manner,. Remove the cause of the injury, available drugs to promote nerve recovery. As long as timely treatment can be completely cured. (2) Prevention of complications: artificial knee replacement is a large reconstructive surgery, and is prone to a variety of local and systemic complications after surgery, such as peroneal nerve injury, joint stiffness, and infection. 3.Functional exercise: The main task of artificial knee joint replacement after surgery is to exercise the knee joint function, return to work, or to take care of your own life. Do a good job of preparation before exercise, clothes to wear loose, it is best to wear pajamas and pajamas, wear thick-soled shoes, in order to avoid slipping, patented system of the elderly should be defecation, urination, and then exercise more than 3 times, each time for 30-45 minutes. Do not interrupt. Local pain and swelling in the exercise process, relieve in a few hours, this is a normal phenomenon, such as continued to the 2nd day does not relieve when you can adjust the training of high pleasure method or temporarily reduce the number of training, to be relieved to continue training, but can not stop training. The training method mainly focuses on active activities. (1) Ankle up and down, left and right rotation activities: 3 times a day, 30-50 times each time. (2) Quadriceps static contraction: lying position, the affected limb is fully straightened, the opposite limb is flexed, the femoral muscles of the straightened limb are contracted, and the patella is slightly moved upward. Then count 5, and then relax the contracted femoral muscles, that is, 1 time. Repeat 30 times, 3 times a day. (3) Straight leg raising exercise): lie down, fully straighten the limb to be practiced, bend the knee on the opposite side, slowly lift the straightened lower limb about 30 degrees, at this time the quadriceps muscle exerts the greatest force, and then count 5 times, slowly down to the bed, that is, 1 time, repeat 30 times, 3 times a day training. 4, postoperative review review should be regular and long-term persistence so that you can correctly carry out functional exercises, early return to normal life and work, and at the same time, the artificial joint for close observation, in order to maintain the good function of the artificial joint for a long time, the time schedule, review items see this section of the artificial hip arthroplasty part.