The main purpose of rehabilitation training for artificial knee replacement surgery is to quickly restore the function of the affected limb and achieve self-care as soon as possible, which mainly includes training for knee joint, ankle joint, muscle and ligament strength. 1. On the day after the surgery, keep the joints in the functional position and do some movements such as hooking the feet and tensing the legs to promote blood circulation in the lower limbs. 2. On the 2nd to 7th day after the operation, the same as the preoperative exercises, increase the straight leg raising training; when the knee joint is in a painless state, then carry out the passive movement of the knee joint. 3. In the second week after surgery, the focus is on strengthening the active movement of the affected limb, but attention should be paid to gradually improve the joints of the affected limb under non-weight-bearing condition, and try to achieve the active range of motion. 4. In the 3rd week after surgery, the weight-bearing capacity of the affected limb will be gradually restored, and the patient’s walking gait will be trained to improve the patient’s balance, which will help to restore the normal range of motion of the knee joint. Postoperative rehabilitation training should be carried out under the guidance of a regular doctor, and should not be done on your own to avoid secondary damage to the knee joint.