The pulp and paper industry occupies one of the leading places among various sectors of the national economy in terms of versatility and prevalence throughout the world, as well as the need for its products for the economy of any country. In addition, with the advent of printing systems that operate at an increasingly faster speed and perform complex tasks, the requirements for the properties and quality of paper have increased. At present, powdered cellulose is a promising direction in the development of the pulp and paper industry. The article discusses the possibility of obtaining powdered cellulose with preliminary grinding on a knifeless grinding plant of the “jet-barrier” type. The morphological properties of the fiber and the degree of polymerization of powdered cellulose are given depending on the degree of grinding.