Aiming at the problem of reducing consumption and reducing carbon in the sintering process under the background of "carbon peak and carbon neutrality" in green production in the iron and steel industry, an industrialized test of natural gas injection on sintering material surface of 930 mm ultra-thick layer is carried out on a 550 m² sintering machine of Zenith Steel. The effects of natural gas injection on the negative sintering pressure, drum strength, FeO content, low temperature reduction pulverization rate, internal reversion rate and ore phase structure are analyzed. The results show that when the natural gas injection volume is gradually increased from 0 m³/h to 600 m³/h, the solid fuel consumption is gradually decreased, and the lowest is 3.77 kg/t lower than the baseline, the solid fuel is decreased by 7.0%, contributing to the sintering process CO₂ emission reduction of 9.19 kg/t; under the current sintering raw materials and process conditions in Zenith Steel, the optimal natural gas injection rate is 300 m³/h. The next step is to further improve the natural gas injection device and enhance the gas-solid fuel coupling combustion degree to achieve greater carbon reduction in sintering.