In order to better coordinate the sintering flue gas, an integrated control technology is established, and sintering experiments are performed on mixtures with different carbon content. The test data of CO, SO₂, NO_x, O₂ and other components in the sintered flue gas were measured online in real time by the German testo350 flue gas analyzer, and the formation mechanism and main influencing factors of CO, SO₂, NO_x during the sintering process were analyzed. The results show that during the sintering process, the average mass concentration of CO rises with the increase of carbon content; SO₂ emissions always have a peak range of emission mass concentration before the end of sintering; The NO_x in the flue gas mainly comes from the fuel-type NO_x produced by fuel combustion. The N introduced by the sintered fuel should be minimized. It is recommended that the flue gas be treated in stages, and the area with high SO₂ mass concentration be introduced into the ignition area to achieve hot air sintering. Self-reaction and self-catalysis synergistically reduce the mass concentration of its pollutants.