Wastewater of a business analysis and integrated manner, in order to develop all kinds of exhaust gas treatment technology, with a view to a lower investment in equipment, raw and auxiliary materials, less investment and operating costs, removal of harmful substances in waste water to make it into a you can re-use of raw materials, the subject has been referred to the urgent agenda viscose fiber plant, through the process of comparison, the last to be the best option for the recovery from wastewater Glauber's salt, and then preparation of caustic soda, Glauber's salt. At home and abroad have done the previous research in this direction is theoretically feasible, and laboratory facilities, improving the process are feasible, simple operation, reliable operation and high degree of automation for a wide range of corporate governance, production is feasible. The experiment system of caustic soda in the process of Glauber's salt key point is the inclusion of sodium bicarbonate, sodium bicarbonate accession greatly improved the conversion rate of caustic soda.