Amylase can break down starch into maltose. Amylase is a general term for enzymes that hydrolyze starch and glycogen, usually through amylase catalyzed hydrolysis of starch slurry on fabrics, due to the high efficiency and specificity of amylase, enzyme desizing has a high desizing rate, fast desizing, less contamination, and the product is softer than the acid method and alkaline method, and it does not damage the fibers. There are many types of amylase, according to different fabrics, different combinations of equipment, different processes, the desizing methods used at present are impregnation, stacking, roll dyeing, continuous washing, etc. Due to the small mechanical effect of amylase desizing, the amount of water is small, and the desizing effect can be achieved at low temperatures, which is distinctive and environmentally friendly.