The invention relates to the technical field of materials, in particular to a GISSMO material failure model parameter optimization method which comprises the following steps: S1, determining a real stress-strain curve of simulation input; s2, comparing the simulation result of the uniaxial stretching virtual sample with the test result to determine the initial range of the WF; s3, under the condition that no keyword * MAT_ADD _ EROSION exists, optimizing the material parameter WF by adopting an interval reduction sequence based on a meta-model; and S4, adding * MATs _ ADD _ EROSION, namely a GISSMO failure model, and optimizing GISSMO failure model parameters by adopting an optimization method consistent with the step S3 and a target function. According to the method, based on a GISSMO failure model provided in commercial finite element software LS-DYNA, GISSMO failure model parameters are reversely solved and calibrated according to material mechanical property test data parameters; by adopting the LS-OPT, material parameters can be quickly identified, so that output engineering stress-strain curves of simulation and test can obtain relatively good consistency, and a reference canbe provided for establishment of a quick, automatic and high-precision failure material library.