Abstract: As the reason of both the ion components' complexity and the higher content of various ion,not only will a single water treatment method be confined,but the section of the water treatment has need to bear higher expenses of the engineering operation in the purification of the higher-sulphate mine water.In the opinion of the comprehensive industrialization of the waste water treatment and the rule of the solubility product,the method using the barium reagent has been proved to be feasible in the purification of the higher-sulphate mine water through authors' experiments.It can make a single water-treating project to become a comprehensive industrialized department that has the products of clean water and of precipitate barium sulphate.