As nanotechnology and materials science continue to develop, the preparation methods and application fields of cationic silica sol will continue to expand. In the future, the development of cationic silica sol will show the following trends: By optimizing preparation methods and performance control techniques, cationic silica sol with higher performance (such as higher specific surface area, more uniform pore size distribution, stronger adsorption performance and catalytic activity) will be prepared to meet a wider range of application needs.