During the "13th Five-Year Plan" period, under the policy guidance of supply-side structural reform and industry efforts, the chlor-alkali industry has achieved remarkable results. The disorderly expansion of the production capacity of industry-leading products has been effectively controlled, the layout has been more reasonable, the product structure has been continuously optimized, the consumption of energy and resources has been continuously reduced, the comprehensive utilization of resources and environmental protection have steadily improved, and the overall profitability has been significantly improved. However, the imbalance of alkali and chlorine caused by "alkali short and long chlorine" and "replenishing chlorine with alkali" is still serious. The further development of chlorine-consuming downstream products and the development of existing chlorine product consumption areas are still facing challenges, and the homogenization of industry leading products is also very fierce. .