Based on MATLAB/GUI software, a visual simulation software was developed for typical terminal-sensitive projectile countermeasure By entering initial parameters, weather conditions, etc. through interaction face, the projectile's real-time motion, infrared radiation during flight can be got, and the corresponding measures of interference were given, the simulation results were output in real time as table or image. The simulation results show that the simulations accurately reflect the projectile's motion parameter change, it is easy to control and provides technical support for developement, countermeasure and tactical training of terminal-sensitive projectile.