Abstract: Cyclone is the main separation or concentration equipment in coal preparation plant.Based on the working principle of the cyclone,the causes and wear forms of the lining wear of the cyclone were analyzed.high-speed rotating friction of solid-liquid two-phase flow accompanied by impact damage is the main reason for the damage and wear of the cyclone lining.Impact wear and micro cutting wear are the main forms of wear damage of cyclone lining.The characteristics of metal and metal compounds,polyurethane products and non-metal wear-resistant materials used in the cyclone lining were analyzed in this paper,and the selection principle of the cyclone lining materials was proposed.Specifically,the polyurethane material can be used in the coal slurry heavy medium cyclone with an inner diameter less than350 mm,and the cyclone with an inner diameter less than 500 mm.The high chromium cast iron material is mainly used in the concentration cyclone with a diameter less than 500 mm,and the alumina material,toughened alumina or silicon nitride ceramics is recommended using in the separation heavy medium cyclone.