In view of the present situations that equipment and technologies could not keep pace with the expanded scale in viscose fiber industry, high energy consumption and high pollution problems have restricted the development of viscose fiber companies, through the introduction of new technologies（ concentration nitre extracting technology by acid bath one-step method, cascade utilization of steam, comprehensive utilization of waste water and heat ）, realizing the optimization and integration of process chain, conducting the research and development of energy-efficient equipment （large capacity sulfonated machine of BATCH recipe control, efficient 96 spindle built-in spinning machine with second bath unit, scouring machine with multistage net belt deviation-adjusting device）, developing new products with comprehensive performance in extend upstream and downstream industry chain, applying advanced air and water treatment  technologies ( separation, purification and making sections technology of sodium hydrosulfide, adsorption treatment technology of CS₂ with activated carbon ) , developing regional circular economy, Xingda Chemical Fiber Corporation Ltd.of Tangshan Sanyou Group has achieved the purpose of reducing the production cost and energy conservation of viscose staple fiber, and provided a new way for the sustainable development of viscose fiber industry.