Countermeasures: 1. Joint cavity infusion of sodium vitrate: sodium vitrate, also known as sodium hyaluronate, is the main component of joint fluid. Synthetic sodium vitrate, which is a polymer cross-linked structure with high viscosity and elasticity, can fill the defect formed by cartilage destruction after infusion into the joint cavity, interrupt the process of cartilage destruction by inflammatory factors, reduce the stimulation of nerves and alleviate pain. At the same time, its viscoelasticity has a buffering effect, reducing the impact between the knee joint surfaces and delaying the development of the disease. 2, joint cavity infusion glucocorticoids: is the so-called closed treatment, glucocorticoids can quickly reduce the inflammatory response of the knee joint, improve the symptoms, but can not be used for a long time, only as an infusion of sodium glass acid, early application to control symptoms. It needs to be used with caution. 3, reduce weight, reduce the pressure of damage to the knee joint; exercise quadriceps (thigh muscles) strength, can be exercised by riding a bicycle (it is recommended to buy home bicycle exercise fitness equipment, than the elderly outside cycling safety) quadriceps strength, muscle strength increases, can strengthen the stability of the knee joint, thus reducing the damage to the knee cartilage. 4, total knee arthroplasty: for advanced osteoarthrosis of the knee, complete destruction of knee cartilage, joint space narrowing, affecting daily life, total knee arthroplasty is the best choice to remove the foci of knee pain and quickly restore joint function, many patients can return to normal living conditions, a week after surgery can be down to the ground activities. Artificial joints are used for about 20 years, which is a very good choice for the elderly.