Abstract: In order to efficiently convey coal slime in Shanjiaoshu coal preparation plant,pipline conveying system is used. Introduced structure,working principle,technical features and parameters of this system as well as analyzed its use in production. The application shows that this system can not only improve coal slime conveying efficiency and utilization,but also prevent the slime from secondary populating during transportation,with a solution to supply power boiler with fuel,confirming to demands of environmental protection and energy saving nowadays.