Spherical packing, also known as porous rotating spherical suspended packing, is a new series of products developed among many kinds of packing used in sewage treatment and biofilm treatment technology. It has a structure in the biochemical treatment of sewage with a large specific surface area. It is directly put into use without fixing, and it is easy to hang the membrane and does not block. Suspended spherical filler without sludge is a new product developed on the basis of numerous sewage treatment fillers. It mainly acts as a biofilm carrier, and also has the function of intercepting suspended solids. It has the advantages of good biological adhesion, large specific surface area, high porosity, good chemical and biological stability, and good hydrophilic performance. It is soft and semi- Softness, combination, and elastic filler cannot be achieved.