Firstly, mix kaolinite ore with water, put dispersant into stir pulp machine, and then pulp feed into hydrocyclone for removing coarse gangue. Utilize high gradient magnetic separator to remove iron, titanium and other magnetic gangues of fine pulp. Quartz gangue and non-magnetic iron minerals can be removed by reverse flotation process, and finally qualified kaolinite concentrate will be fed into hydrocyclone for classification. Coarse kaolin returned to the tower mill, and qualified kaolinite need dewatering and drying.