Abstract: Briefly introduced the process condition of two dense medium separation workshops in Shuiquan coal preparation plant,focused on the advantages and problems existed in the two separation processes,introduced the production situation of the two workshops,also based the on the production practice of the two processes,compared the sharpness of separation,geometrical form,density of suspension and sliming feature of feed between the gravity feed three-product dense medium cyclone and pump feed three-product dense medium cyclone.