The opening machine is mainly used to loosen fibers, cotton, textiles and other materials. By tearing, the large tangled fibers are loosened into small pieces or bundles. At the same time, it has the function of mixing and removing impurities during the loosening process. The opener is generally composed of a pair of feeding rollers or feeding rollers and a opener cylinder. The opener cylinder is equipped with corner nails or comb needles or needle cloth or porcupine beaters. In order to make the opening more thorough, some of them are equipped with working rollers and stripping rollers. Different structures make the effect of opening, mixing and impurity removal obviously different, so different forms of opening machine should be used in different production lines. The opening machine can also be selected according to the raw materials to be processed, and the fiber after opening can be fed into the carding machine for processing.