The Cotton classification system is considered one of the most important factors that has an effect on produced cotton yarns quality, so we - in this research – have studied these items : the increased neps percentage phenomenon (state). the cotton grades which recorded on the cotton bales. Detection of local cotton classification system accuracy and efficiency. study of the possibility of application SOLVIOV equation on Syrian cotton classification has been done certain tests on cotton samples which have been taken from different ginning centers and different bales.