The simultaneous removal of gaseous pollutants from combustion flue gas by wet chemical methods is one of the most important ways for the air pollution control from combustion sources. To examine the feasibility of the simultaneous removal of SO₂, NO_x and CO₂ by using varied oxidization-absorption methods, the performances of nine kinds of combined oxidization-absorption strategies were analyzed based on the principle of chemical thermodynamics, including H₂O₂-NH₃·H₂O, H₂O₂-MDEA, H₂O₂-NaOH, O₃-NH₃·H₂O, O₃-MDEA, O₃-NaOH, NaClO₂-NH₃·H₂O, NaClO₂-MDEA and NaClO₂-NaOH. Furthermore, a new dynamic-weighted method was proposed to comprehensively assess their performances. The results show that all the strategies have the removal feasibility:O₃-NaOH, NaClO₂-MDEA and NaOH perform best for the separate removal of SO₂, NO_x and CO₂ respectively. NaClO₂-MDEA is superior to other strategies when considering capturing SO₂, NO_x and CO₂ simultaneously. The results may provide a reference to the combined removal of gaseous gas pollutants from combustion flue gas.