Abstract: With creep test data of ZSGH4169 alloy, the θ-projection method with 16 parameters was used to analyse the creep curves, and the equation parameters were obtained. The creep behaviour and stress relaxation of different notched specimens were simulated and calculated with the net section stress as unified standard. The results show that the θ-projection method could describe the creep behaviour of ZSGH4169 alloy accurately through the obtained parameters. The higher the degree of stress concentration, the more obvious the creep deformation of the specimen notch root, and the higher the degree of stress relaxation. When the stress concentration factor was small, the creep deformation of notched specimens approached that of non-notched specimens. The stress concentration factor (or maximum stress) and stress gradient influence factor were introduced to modify the traditional creep model, and the general expression for calculating the creep deformation of notched specimens was given.