The monograph is devoted to the set task - development of a new working body of the cotton cleaner, substantiation of working parameters and modes of movement of the stake-drum cleaner, giving the possibility of maximum preservation of natural properties of raw cotton, which determines its relevance. Theoretical-experimental method of calculation of the cleaning process is developed, as well as substantiation of working parameters of a stake drum with sinusoidal arrangement of stakes and variable modes of movement of the working body of the cleaner, providing preservation of natural properties of cotton and seeds. Recommended for researchers, masters and doctoral students.Recommended for printing by the Council of Namangan Engineering and Construction Institute of 30 March 2023 (Minutes 9).