As the saying goes, “The legs age before the person ages. ” Chronic disorders of the knee joint also indicate the aging of a person. Therefore, we should pay attention to the maintenance of the knee joint. Knee maintenance needs to pay attention to the following aspects: a. Try to avoid obesity, to prevent aggravating the burden on the knee joint. Obesity not only increases the weight and burden on the knee joint, but also increases the risk of cardiovascular and cerebrovascular diseases, so avoiding overweight is the best choice. Second, change bad posture and habits, full activity before exercise. Avoid prolonged sitting and standing, prolonged sitting hurts meat, prolonged standing hurts bone. Avoid prolonged squatting, because the weight of the knee joint when squatting is 3 to 6 times its own weight, long squatting aggravates the pressure between the knee joint. When participating in physical exercise to do a good job of preparing activities, gently stretch the knee joint, and then participate in strenuous exercise can reduce knee injury. Do not wear high heels when walking long distances, but wear thick-soled and flexible soft-soled shoes to reduce the impact on the knee joint and avoid wear and tear on the knee joint. Fourth, pay attention to avoid cold. When the knee joint encounters cold, blood vessels contract and blood circulation becomes poor, and the evil of wind and cold stays in the joint and becomes paralysis over time. Therefore, when the weather is cold, you should pay attention to keep warm to prevent the knee joint from getting cold. Fifth, pay attention to a balanced diet, pay attention to the intake of calcium and vitamins to prevent knee arthropathy caused by abnormal calcium metabolism. People with osteoarthrosis of the knee should avoid overexertion of the knee joint, less stairs, less hiking, less standing, less heavy lifting, and proper functional exercise to increase the stability of the knee joint and prevent muscle atrophy of the leg, which not only relieves joint pain, but also prevents the progression of the disease, do not think that only rest and inactivity can protect the diseased knee joint.