Abstract: Ceramic polishing sludge contains a large amount of moisture and it has not been effectively classified, which becomes bottlenecks restricting its large scale recycling use. A vertical drying classification system for ceramic polishing sludge, developed independently by Sinoma Technology & Equipment Group Co., Ltd. and applied in Guangzhou Xianglong Environmental Protection Technology Co., Ltd. , is introduced in this paper. The process of the whole system, operating parameters, improvement measures for the existing problems, and the operational performance, etc., have been investigated.