The exhaust gas absorption tower has the characteristics of simple structure, low energy consumption, high purification efficiency and wide application range. The exhaust gas absorption tower can effectively remove hydrogen chloride gas (HCI), hydrogen fluoride gas (HF), ammonia gas (NH3), sulfuric acid mist (H2SO4), chromic acid mist (Cr03), hydrogen cyanideWater-soluble gases such as gas (HCN), and the purified acid mist exhaust gas meet the emission standards.