Abstract: To improve the accuracy and efficiency of J-C constitutive parameters of A100 steel. A two-dimensional milling simulation model combined with an orthogonal table is used to obtain the simulated value of milling force and milling temperature under different horizontal combinations of each J-C constitutive parameters of A100 steel. According to the factor level of the orthogonal table, we obtained the response of the constitutive parameters and the influence of the variables, and compared them with the simulation results of the corresponding 3D simulation model to verify the applicability of the equivalent 2D milling simulation model. The results show that the milling force and milling temperature are most sensitive to the change of thermal softening coefficient m, insensitive to the strain reinforcement coefficient B and machining hardening index n, and the equivalent two-dimensional milling simulation model is suitable.