In order to treat the waste gas produced during harmless disposal of dead animals by incineration method,a flue gas purification system based on the process of "quench+dry deacidification+activated carbon adsorption+bag dust removal" was designed. The effects of cooling water consumption, hydrated lime consumption and activated carbon consumption on the treatment were investigated. The results shows that when the cooling water consumption is 0.9 t/h, the calcium acid ratio is 1.4 and the dosage of activated carbon is 3 kg/h, the removal rates of acid gas and dioxin reach 75.32% and 95.42%, respectively. The average emission concentration of dioxin is 0.023 ng-TEQ/Nm3. The total operating cost is about 137.35 yuan/h.