Abstract: The quasi-static mechanical properties at room temperature and dynamic mechanical properties at 20-400 ℃ of the aircraft engine casing material GH907 superalloy were investigated on the universal test machine, Hopkinson tension bar and Hopkinson pressure bar equipments. Based on the test results, the parameters in the Johnson-Cook (J-C) constitutive model and failure model were obtained by fitting, and the dynamic compression process of the test alloy was simulated. The effectiveness of the constitutive model parameters were evaluated. The results show that during tension at room temperature and the strain rates of 0-3 000 s^-1, the test alloy was sensitive to strain rates, but during compression was not. At temperatures of 20-400 ℃, the softening behaviour of the test alloy was obvious. The established J-C models could accurately predict the mechanical behavior of the alloy at different temperatures and strain rates; the relative errors between the simulation and the test results of the sample geometrical size and maximum stress were within 2%.