The invention relates to the field of gas treatment, and discloses a smoke treatment method. The method comprises the step of performing SCR denitration processing and desulfuration processing on smoke generated by coal combustion, and is characterized by also comprising: contacting the smoke with an alkali solution in an atomized state to convert HF, HCl and SO3 gas in the smoke into solid salt before the SCR denitration processing. According to the method, the HF and HCl in the smoke can be effectively removed, various problems caused by enriching of F<-> and Cl<-> of a desulfuration absorption tower due to introduction of the smoke are solved, and the method is simple and low in operation cost.