In order to understand the distribution and emission of volatile organic compounds (VOCs) in flue gas of circulating fluidized bed (CFB) boiler,as well as the treatment effect of flue gas treatment device,the whole process concentration monitoring of CH4,non-methane total hydrocarbon (NMHCs) and a variety of typical VOCs components in flue gas of a 200 MW CFB boiler unit was carried out. The contents of CH4 and NMHCs in three solid samples of coal burning,fly ash and slag were analyzed. The results show that the mass concentrations of CH4 and NMHCs in the flue gas at the entrance of SCR are 0.65 and 6.63 mg/m3 respectively under 100% and 50% load of CFB boiler units,and the mass concentrations of CH4 emission and NMHCs after a series of flue gas treatment devices are 0.14-0.18 and 1.05-1.43 mg/m3,respectively. The total VOCs content in coal sample is 49 979.65 mg/kg,while only a small amount of VOCs remains in fly ash and slag. The flue gas of CFB boiler unit is mainly benzene series with carbon atomic number ≥6,such as benzene,toluene,ethylbenzene,p/m-xylene,styrene,o-xylene and hydrocarbons represented by n-hexane. SCR denitration system and bag filter have better treatment efficiency for VOCs in flue gas. After all pollutant treatment equipment,the total VOCs mass concentration discharged through the chimney is 1.19-1.61 mg/m3,and the total VOCs synergistic removal efficiency is 77.88%-78.64%. The overall removal effect of existing flue gas treatment facilities can meet the corresponding discharge requirements.