In order to improve coarse coal slime separation efficiency of Dongpang Mine coarse slime sorting technology index, after Dongpang Mine coal preparation plant coarse coal slime separation system was put into operation, various link of coarse slime sorting system was experimented in system, through summarizing these data, coarse slime sorting system should be taken as whole in the production. Through summarizing the experiment data of Dongpang Mine coarse slime sorting system, which proved that the importance of coarse coal slime separator associated classification and subsequent desliming link in coarse slime sorting system.