Matting powder is a new type of leather injury matting agent made of polyacrylamide, film-forming material. It is used for the repair of dark and light-colored surface injuries and deeply injured leather grains. It has strong covering power and good repairing effect. It does not need to be formulated with other soft skinning materials, and can be directly used for "brushing" or "spotting" repair, which simplifies the original use method. The manufacturing process is simple, the raw materials are easy to obtain, and it is easy to form mass production and popularization and application, so as to meet the needs of the leather industry. It can be divided into oil-based matting powder and water-based matting powder. It is widely used in various paint systems such as latex paint, interior and exterior wall paint, alkyd resin paint and polyester paint. In the application of coatings and paints, it can control the surface gloss of the coating film in a balanced manner, increase the abrasion resistance and scratch resistance of the coating film, dehumidify, deodorize, purify the air, sound insulation, waterproof and thermal insulation, and permeability.