Abstract: In order to study the effect of jet action condition factors such as inclination angle and standoff of the shaped warhead on the interference duration of heavy reactive armor, a calculation model of jet action conditions affecting the interference duration of the heavy reactive armor was established by a combination of numerical simulation and theoretical calculation. The law of the influence of different inclination angles on the flying characteristics of the explosive reaction armor and the duration of the interference field was obtained. Numerical simulation results show that the blast height of the inclination angle has a significant effect on the flying behavior of the reactive armor flying plate and the action time of the interference field; the flying speed and the peak acceleration of the flying plate decrease with the increase of the inclination angle; as the blast height increases, the peak value first increases and then decreases. When the explosion height is small (2d_c), the interference time increases with the increase of the inclination angle; when the explosion height is great, the interference time decreases with the increase of the inclination angle. The numerical simulation results and the theoretical calculation results match well.