Osteoarthritis of the knee, also known as degenerative arthritis of the knee, is a chronic osteoarthropathy caused by degeneration of the joint and destruction of the articular cartilage, with the main lesions being degenerative lesions of the articular cartilage and secondary osteophytes. It is a common clinical disease characterized by progressive degeneration and loss of articular cartilage in the elderly, and its incidence is on the rise with the increase of life expectancy and the advent of an aging society. It is difficult to effectively control the development of the disease by purely relying on drugs or surgery. Health education, guiding patients to change their lifestyle and exercise, and mastering appropriate exercise therapy can often achieve twice the result with half the effort. Ligaments, bursae and other structures, vulnerable to acute and chronic injury and the attack of wind, cold and dampness, knee osteoarthritis, in the Chinese medicine is a paralysis category. Its occurrence is closely related to the climate. Therefore, the elderly should first pay attention to the warmth of the knee joint to prevent cold (with knee pads or elastic bandages). The patient should be convinced that the prognosis is good and that the symptoms can be eliminated or reduced and normal life and work can be carried out as long as the patient is treated in a timely and reasonable manner, changes the poor lifestyle and exercises the atrophied knee muscles under the guidance of the rehabilitation teacher. In addition, the patient should be instructed to cultivate interest in life, increase social interaction, overcome depression, tension, fear and other negative emotions, and establish a positive and optimistic attitude, which is conducive to the recovery of the disease. 3. Weight reduction: Weight gain is directly proportional to the onset of osteoarthritis of the knee. Obesity is also a factor that aggravates the disease. Weight loss in obese people can reduce the incidence of osteoarthritis of the knee. Data show that the incidence of osteoarthritis of the knee can increase or decrease by 40% for every 4-5 kg of weight loss in obese women and 4-8 times the incidence in obese men. If weight loss is successful, the incidence of symptomatic arthritis can be reduced by 26% to 52% in men and 28% to 53% in women. Therefore, weight loss should be achieved by controlling diet, improving food structure (low-fat, low-sugar, low-sodium diet), and strengthening non-weight-bearing exercise. 4, reasonable physical exercise: after the pain is relieved, walk slowly on flat ground 1~2 times a day, 30~50 min each time, and the amount of activity should be comfortable and slightly sweating. Avoid and reduce the wear and tear of joint cartilage by minimizing weight-bearing exercises for the knee joint such as going up and down steps and running. Older adults should not take a half-squatting position, making the knee joint sway back and forth. The pressure on the patellar surface is greatest when half squatting, and rocking will increase wear and tear, resulting in osteoarthritis of the knee joint. 5, exercise therapy: the body due to physiological aging muscle atrophy, muscle strength decline, the joint protection function is reduced, resulting in joint instability, joint cartilage is vulnerable to injury and cause osteoarthritis of the knee joint. The patient’s pain causes a decrease in mobility, which leads to the disuse of muscles and other motor organs, further atrophy of muscles, further development of the disease, and so on, in a vicious circle. Exercise therapy can increase the muscle strength of the muscles around the knee joint, breaking the vicious circle and promoting improvement of the disease. A number of international randomized controlled trials have confirmed that the analgesic effect of exercise therapy is no less than that of drug therapy, and even in terminal patients, exercise therapy is very effective in improving the patient’s mobility. Muscle exercise: straight leg raise, lateral leg raise, prone knee flexion training, 2~3 times a day, 20~30 strokes each time.