The sequelae after knee replacement surgery include the following: First, the formation of deep vein thrombosis in the lower extremities: After knee replacement surgery, the lower extremity blood vessels are subjected to the pressure of the tourniquet during the surgery, as well as poor post-operative rehabilitation, which can lead to the formation of venous thrombosis, and the patient can experience swelling, pain, and restricted movement in the lower legs. Second, knee stiffness: after knee replacement surgery, the joint will be swollen and painful. If the patient fears the above symptoms and cannot cooperate well with joint flexion and extension activities, knee stiffness will occur and cause intra-articular adhesions, which affect the weight-bearing walking of the joint. Third, joint infection: Knee replacement surgery is the implantation of artificial prosthesis, if bacteria enter the joint through blood circulation, it can cause joint infection, resulting in serious damage to joint function. Therefore, it is important to try to prevent the occurrence of sequelae after knee replacement surgery.