Ionic liquid catalyst is a green high-end new material, the product technology is in the international leading level, the raw material source is sufficient, the product quality is high, the market competitiveness is strong, but also will help calcium carbide PVC industry green and low-carbon development, the implementation of the project will bring considerable economic benefits, ecological benefits and social benefits. At present, the domestic production capacity of calcium carbide PVC is about 25.58 million tons/year, and the market application prospect is broad.