Chitosan is formulated with physiological balancing fluid and is suitable for general surgery, obstetrics and gynecology and other pelvic and abdominal surgeries to prevent postoperative intestinal adhesions and pelvic adhesions. It is applied evenly to the intestinal canal, organ surfaces and mural peritoneum in the abdominal and pelvic cavities before closing the abdomen to provide the relevant effect. Its mechanism of action is that chitosan has the biological property of selectively promoting the growth of epithelial and endothelial cells and inhibiting the growth of fibroblasts, thus promoting physiological tissue repair, inhibiting scar formation and reducing tissue adhesions. It also has a local hemostatic effect and can inhibit the formation of blood fibrin bundles, thus reducing tissue adhesions caused by hematoma mechanization. In addition, chitosan has a lubricating and biological barrier effect, which effectively prevents adhesions from occurring. The protection of articular cartilage lies in the physicochemical action of chitosan, which is similar to that of aminoglycans in the joints and has the characteristics of viscoelasticity and slow absorption. The cartilage and cartilage matrix form the basis of metabolism when aminopolysaccharide is used, which causes that several butyl sugars can be used in joint surgery to achieve better results.