Because of surfactant or wetting anti-stick, or a breaking emulsification, foaming or anti-foaming and solubilization, dispersion, washing, anti-corrosion, anti-static and a series of physical and chemical effects and the corresponding practical application to become a class of flexible extensive use of fine chemical products. In addition to the surfactant as a detergent in their daily lives, other applications can cover almost all of the field of fine chemicals.