Patients can usually walk normally for 2-4 weeks after knee replacement surgery, as follows. Within 1-2 weeks after knee replacement surgery, patients can be affected by weight-bearing walking due to local swelling and pain, at which time they usually need an auxiliary walker to walk before they can resume normal life. Gradually increasing the range of motion of the knee joint and the strength and intensity of the muscles around the knee joint within two weeks can result in significant improvements in muscle strength. Patients can resume normal weight-bearing walking at 2-4 weeks, when there is no significant pain or swelling in the knee joint during walking, and can return to normal life. After resuming walking, patients still need to insist on leg muscle strength training to maintain the stability of the knee joint and to extend the life of the artificial joint.