"Cotton mill" is a factory that uses cotton fiber (i.e. cotton) for textile. The fiber covered on the seeds of Malvaceae cotton plants, also known as cotton, referred to as cotton. It is an important raw material for textile industry. Cotton fiber products have good moisture absorption and air permeability, soft and warm. Cotton is mostly an annual plant. It is developed from epidermal cells growing on cotton seeds. The growth of cotton fiber can be divided into three stages: elongation stage, thickening stage and warping stage. Cotton fiber is the main raw material of China's textile industry. It plays a very important role in textile fiber. China is one of the major cotton producing countries in the world. At present, China's cotton output has entered the forefront of the world. Cotton planting in China is almost all over the country. Among them, the Yellow River Basin and the Yangtze River Basin are the main areas, plus five cotton areas in the northwest inland, Liaohe River Basin, South China and. The original meaning of textile is derived from the general name of spinning and weaving. However, with the continuous development and improvement of textile knowledge system and discipline system, especially after the emergence of non-woven textile materials and three-dimensional composite weaving technology, today's textile is not only traditional manual spinning and weaving, but also non-woven technology, modern three-dimensional weaving technology, modern electrostatic nano netting technology, etc, Therefore, modern textile refers to a multi-scale structure processing technology of fiber or fiber aggregate. Ancient Chinese textile and printing and dyeing technology has a very long history. As early as the primitive society, in order to adapt to climate change, the ancients knew how to use local materials, use natural resources as raw materials for textile and printing and dyeing, and make simple manual textile tools. Up to now, our daily clothes, some daily necessities and works of art are the products of textile and printing and dyeing technology.