Due to its advantages such as large specific surface area, high utilization rate, variable voids without blockage, wide application range, low cost, and less freight, combined packing has been widely used in the treatment of wastewater containing cyanide in printing and dyeing, silk, wool spinning, food, pharmaceutical, petrochemical, papermaking, hemp spinning, hospitals and other industries in recent years. In order to make it give full play to greater product characteristics and economic benefits. In recent years, with the guidance and help of relevant scientific research institutions, soft packing has been continuously innovated, with various forms, reasonable structures and better effects. It has overcome the disadvantages of the original products, such as small actual surface area, easy breakage of the central rope and agglomeration in the middle of the fiber bundle, thus being widely welcomed by users.