Pressurized O₂/CO₂ combustion technology is a new combustion technology that can achieve efficient CO2 capture. In order to explore the combustion and pollutant emissions characteristics of pulverized coal in a pressurized O₂/CO₂ atmosphere, the pressurized combustion (residence time is 0.3 s) and N transformation characteristics of Shenhua bituminous coal were investigated by a pressurized drop tube furnace (PDTF) experimental system at a pressure of 0.9 MPa. Effect of combustion temperature (1 073-1 273 K) on the formation rules of gaseous products (CO, N₂O and NO) in the O₂/CO₂ combustion process was analyzed by online measurement, and effect of combustion temperature on the physical and chemical structure of combustion residues was analyzed by off-line characterization. In the pressurized combustion process of pulverized coal, the increase of combustion temperature causes the conversion rate of fuel nitrogen to NOx in coal to increase first and then decrease. In the combustion temperature range of 1 073-1 273 K, compared with N2O, the increase of combustion temperature has less effect on NO release, and the conversion of fuel nitrogen in coal to gas-phase NOx is mainly determined by the generation of N2O. In the process of coal pressurized O2/CO2 combustion, the concentrations of CO and NO gradually decrease and increase with combustion temperature, while the release of N2O increases first and then decreases with combustion temperature. At 1 273 K, the emission concentrations of CO, NO and N₂O reach 363.5×10^-6, 10.2×10^-6 and 6.8×10^-6, respectively. The FTIR results show that the oxygen-containing groups of the O—C═O structure on the surface of pulverized coal particles have higher combustion reactivity than C—OH structure. As the combustion temperature increases from 1 073 K to 1 273 K, the relative content of C—O dose not change much, and the relative contents of O—C═O, C═O and C—H decrease by 1%, 1% and 7%, respectively, while the relative content of C═C/C—C increases by 7%. It shows that the increasing pressurized combustion temperature can promote the rapid consumption of the C—H structure, and increase the aromatization of the carbon residues. When the temperature is 1 273 K, the relative content of N elements in the form of N-5 and N-6 on the surface of pulverized coal combustion residues decreases and increases by 7% and 5%, respectively. The main source of NOx nitrogen-containing precursors released during pressurized O2/CO2 combustion is the inherent N-Q structure in coke, and its relative content varies little.