Abstract: As the main raw material of aviation fasteners, the mechanical properties of superalloy directly affect the fastening properties of aviation equipment components. In this study, the microstructure, microhardness, mechanical properties and fracture morphology of GH4141 superalloy after different heat treatments were analyzed. The results show that the solution temperature has a great effect on the grain size, and the microhardness decreases with the increase of solution temperature. The residual compressive stress formed on the surface of the samples after heat treatment. The maximum tensile strength of the sample after solution at 1 080 ℃ and aging at 760 ℃ was 1 214 MPa, and the tensile fracture showed obvious features of precipitated phase strengthening induced neck shrinkage and dimples.