Tie-dyeing technique, a traditional technique project of the seventh batch of representative projects of intangible cultural heritage at the municipal level in Lianyungang City. Production of plant dyes: collection, storage and pretreatment: processing technology: plant dyeing technology: fabric pre-dyeing treatment, direct dyeing method, reduction dyeing, medium dyeing Hand-dying techniques: twill, wax twill, clip twill, gray frequency, cloud dyeing, discharge dyeing, snowflake dyeing. In today's trend of advocating environmental protection and nature, the research and creation of plant dyeing using flowers, grass, trees, stems, leaves, fruits, seeds, etc. in nature are integrated into life. Unlike chemical dyes, it will not produce wastewater that is harmful to the natural environment and human health, or other industrial pollution. Dyes obtained from the plant kingdom return to nature and environmental protection in beautiful colors. "Plant dyeing" is the technology of using natural plant dyes to dye fabrics. It is a traditional Chinese fabric dyeing method. It is natural, environmentally friendly and artistic that modern industrial dyeing and weaving cannot express, but it has now been lost in China. Now we are reviving this art, which is of great significance to the protection and inheritance of China's traditional art.