Joint lubricant is clinically called sodium vitrate, which is a biotype agent that works to repair the damaged meniscus. The general course of treatment is one injection per week, and a course of treatment is five injections. When there is more joint fluid, intra-articular injection of sodium vitrate is not suitable, and joint activities need to be restricted, and physical therapy or baking electricity can be given to the knee joint to promote the absorption of joint fluid. When injecting sodium vitrate, avoid strenuous exercise or strenuous injury to the knee joint. If there is injury, the blood circulation is slower and it is not easy to absorb sodium vitrate, which leads to a direct decrease in the treatment effect and affects the activities of the knee joint.