Abstract: In order to solve problems caused by short of capacity of coal slurry processing system and coarse slime with high moisture in coal preparation plant of Pingdingshan coal mining group No. 1 mine,dry screening system starts to be used,modified moving sieve technology system at the same time replaced vibrating screen and magnetic separator. The application shows that the filter pressing system can serve coal slurry well,with moisture drop of coarse slime from 30% to 17%,increased capacity of raw coal processing from 2. 90 Mt/a to 3. 15 Mt/a,meanwhile,clean coal production is increased by 0. 162 5 Mt/a.