In order to improve the water solubility of triazine derivatives,an environmentally friendly extreme pressure and antiwear additive for lubricating oils,two kinds of triazine derivatives,STB and STC were synthesized,which contained watersoluble and antirust sulfonic acid groups.The physicochemical and tribological properties of STB and STC as additives in HFC type fire resistant hydraulic fluid were evaluated.The results show that STB and STC waterbased lubrication additives have a very good effect in extreme pressure, anti-wear and friction reduction in HFC.2% STB and 1% STC in weight can increase the extreme pressure value of HFC to 696 N,which is 109% higher than that of base oil.The results of SEM and XPS analysis show that the chemical reaction occurs during the friction process,and the complex boundary lubricating film composed of inorganic sulfides and organic nitrogen is formed,which plays a good role in antiwear and friction reducing properties.