Abstract: To study the temperature rise characteristics of 550 kV/8000 A large-capacity SF₆ inflatable bushing, a multi-physics field coupling model of 550 kV/8000 A large-capacity SF₆ inflatable bushing was established in this paper. The eddy current effect, skin effect, gravity effect, thermal convection, thermal radiation, and other factors are comprehensively taken into consideration, and 1.1 times the current (8000 A) was calculated and analyzed by using ANSYS software, that is, the distribution law of the temperature field and airflow field of the bushing under the condition of 8800 A current, and the temperature rise test of 550 kV/8000 A SF₆ inflatable bushing was carried out to verify the correctness of the simulation results. Finally, the effects of four influencing factors, such as external wind speed, gas pressure, load current, and outer diameter of the center conductor, on the temperature rise characteristics of the bushing were simulated and analyzed. The research results show that the maximum temperature is located below the small hole in the upper part of the central conductor in the bushing, the maximum temperature is 363 K, and the temperature above the bushing is higher than below from an overall perspective. The simulation results are in good agreement with the experimental results, and the error is within 8%. The temperature rise of the bushing decreases significantly with the increase of the external wind speed, but the degree of declining gradually decreases. The temperature rise of the bushing decreases with the increase of the gas pressure. As the current increases, more Joule heat is generated, and the load current directly affects the conductor temperature rise. The temperature rise of the bushing increases as the outer diameter of the center conductor decreases. The research content of this paper can provide theoretical reference for the design of large-capacity high-pressure SF₆ inflatable bushing in the future.