<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">This article presents calculation of cotton cleaning efficiency of the cotton ginning plant for cotton of low grades. In particular, effective solutions are offered to eliminate the forces and damages affecting cotton during the ginning process. Optimal solutions are shown based on experiments and scientific research to further improve cleaning efficiency in cotton cleaning process. In order to determine factors affecting fiber quality and damage, and improve the efficiency of cleaning processes, researches were carried out on different cotton varieties.</span></span></p>