Abstract: The high-mass (400\,kg) drop weight impact tests for noignition Comp.B were numerically simulated by using the Johnson-Cookconstitutive model, to investigate the mechanical responsecharacteristics of Comp.B in inertial impact. \sigma -t curves ofnumerical simulation with EOS and without EOS were obtained at differentcharge conditions. The main mechanical parameters are compared, such as peakstress, stress rise time, etc., The results of Johnson-Cookconstitutive model with EOS agree better with experiments.This model can be used to simulate the mechanical response characteristicsof explosive in inertial impact.