Non-woven fabrics, also known as non-woven fabrics, are composed of directional or random fibers, and the microstructure has an important impact on the performance of polishing pads. The raw material polymer cotton wool fiber of non-woven polishing pad has good water permeability and strong ability to accommodate polishing slurry, but its hardness is low and the material removal rate is low, so it will reduce the flattening efficiency of the polishing pad, and is commonly used in the fine polishing process or as a buffer layer for composite polishing pads.