In this article, the movement of cotton in a pneumotransport shell is studied, taking into account the forces affecting it. In the proposed device, the pipe is installed on an elastic element to reduce the shock force caused by the impact of the cotton on the pipe walls, and the vibration of the pipe occurs as a result of the movement of the cotton flow, resulting in the cleaning of small impurities through the mesh screen on the pipe walls, in addition, the main function of the elastic element is to clean the cotton theoretical analysis of its action in preventing damage to the seed and increasing the efficiency of cleaning during the milling process.