Tie-dyeing, formerly known as "jiao hua", is an ancient textile dyeing technique in my country. Zhoucheng Village in Dali City, Dali Bai Autonomous Prefecture, and Dacang and Miaojie in Weishan Yi and Hui Autonomous County still retain this traditional technique. Among them, the tie-dyeing industry of the Bai people in Zhoucheng is the most famous and has been named "the hometown of ethnic tie-dyeing" by the Ministry of Culture. According to historical records, dyeing and weaving methods were already available in Dali during the Eastern Han Dynasty. In the 16th year of Zhenyuan in the Tang Dynasty, the Nanzhao dance team performed in Chang'an. The dance costumes they wore were "skirts and jackets with birds, beasts, plants and trees, and patterns with eight colors of leather", which were made by tie-dyeing. During the Ming and Qing Dynasties, the dyeing and weaving techniques in the Bai area of Erhai Lake had reached a very high level, and dyeing guilds emerged. The Erhai Weihong cloth in the Ming Dynasty, the Xizhou cloth and the Dali cloth in the Qing Dynasty were all famous and best-selling products. In modern times, the dyeing and weaving industry in Dali has continued to develop, and Zhoucheng has become a well-known hand-woven dyeing village. Tie-dyeing generally uses cotton white cloth or cotton and linen blended white cloth as raw materials, and the dye is mainly plant indigo (commonly known as Banlangen in Yunnan). The main steps of tie-dyeing include drawing patterns, twisting, soaking, dyeing, steaming, drying, unthreading, and grinding. The key to the technology is the twisting technique and dyeing skills. Dyeing vats, dyeing sticks, drying racks, stone mills, etc. are the main tools for tie-dyeing. Bai tie-dyeing has a variety of varieties. The patterns are mostly small natural patterns, evenly distributed, and the themes are auspicious. They have important aesthetic value and practical functions and are well received by consumers at home and abroad. Dali Bai tie-dyeing shows a strong folk art style. More than one thousand patterns are a microcosm of Bai history and culture for thousands of years, reflecting the customs and aesthetic tastes of the Bai people. Together with various crafts, they constitute the charming Dali Bai weaving and dyeing culture. However, the current trend of industrialization has led to the extinction of some traditional tie-dyeing techniques, the original folk characteristics have begun to degenerate, pollution problems have become increasingly prominent, market operations have fostered an excessive pursuit of economic benefits, and the plant dye Banlangen is in short supply. Under this situation, the inheritance of Bai tie-dyeing techniques is troubled. Only by seriously solving the above problems can we promote the inheritance and development of Dali's traditional Bai weaving and dyeing techniques.