The first natural vat dye used by humans, indigo dye, is said to have begun in the Yin and Zhou dynasties of China. It was used to dye silk fabrics. China's vat dyes began to be researched, trial-produced and produced after the founding of New China. At present, there are more than 80 varieties, and the production capacity has ranked among the best in the world. The vat dyes play an important role in the dyeing and printing of cellulose fiber fabrics due to their excellent dyeing fastness. China's vat dyes still have considerable development prospects in terms of variety, quantity and quality.