Total knee arthroplasty (TKA) can effectively correct knee deformities, relieve knee pain, and improve the quality of life of patients with osteoarthritic knee disease. However, the absence or inadequacy of rehabilitation training often results in postoperative soft tissue adhesions around the knee, muscle atrophy, and partial loss of mobility, which are important factors in patient dissatisfaction after knee arthroplasty. When is rehabilitation training intervened? According to the literature, knee-related muscle training can be started as soon as the patient decides to undergo TKA (i.e., preoperatively). What is the focus of rehabilitation training? Preoperatively, the focus is on quadriceps strength training, such as straight leg raising exercises and knee extension exercises. Postoperatively, individualized training programs are developed on an individual basis around knee mobility, muscle strength, prevention of deep vein thrombosis, and promotion of relief of soft tissue swelling. The plan should be done in phases, including during hospitalization (within 2 weeks postoperatively), 2-8 weeks postoperatively, 8-12 weeks postoperatively, and 3 months – 6 months postoperatively. Training points to note: 1. Practice knee extension and knee flexion are equally important; 2. Progress gradually but not adventurously; 3. Do not overly pursue the angle of knee flexion; 4. Inform in advance and communicate with them continuously so that patients are psychologically prepared for the hard work of rehabilitation training and cooperate well with the training.