The wear of the heating surfaces is a key parameter on the long-term safe and stable operation for a circulating fluidized bed (CFB) boiler,and the wear is affected by many factors,such as the structure of the furnace,coal characteristics,operation method,and maintenance. Abrasion is always concentrated on areas with high solid volume fraction,high flow rate of flue gas and abrupt changes in flow field,such as dense zone,transition zone,connection area of platen heating surface,irregular parts in dilute region,the roof and outlet of furnace,and so on. Therefore,lower velocity of flue gas,the design of kick-out tube,and positive or passive anti-wearing methods are widely adopted to protect heating surfaces for purpose of attenuating adverse effects of the wear on the operation. As for the anti-wear effectiveness,anti-wear beam,metal grid,metal spraying,and laser cladding can all reduce the wear in the furnace to a certain extent,the influence on heat transfer and the convenience of inspection and maintenance need to be taken into consideration before selection of anti-wear technology.In general,the combination of metal grid and metal spraying or laser cladding has achieved the best use effect. At present,the wear problem in the furnace of the CFB boiler has been under effective control. The CFB boilers can continuously operate for longer hours and the operation safety has been significantly improved.