Abstract: Abstract: For the problem that carbonization bands tend to segregate in GH901 alloy forgings, resulting in fluctuations in mechanical properties and affecting the reliability of the service of high-temperature critical components. This study explored the influence laws of solution temperature and aging temperature on the carbonization band microstructure and mechanical properties of the alloy. The results showed that when the heat treatment process was 1090℃×3h solution + 775℃×4h aging, the distribution of carbonization bands in the alloy was uniform, with an average width of 10 μm and an area fraction of 7.8%. The room temperature yield strength of the alloy reached 954 MPa, the tensile strength was 1292 MPa, and the Brinell hardness was 343 HB. At 575℃ and 590 MPa conditions, the high-temperature endurance life was as long as 39.5 hours. This study clarified the influence of heat treatment parameters on carbide strips and mechanical properties, providing technical support for the stable production of GH901 alloy for high-temperature critical components.