Aiming at the problems of limited terrain, old training mode and poor training conditions in shooting training, an actual combat simulation training system is proposed. Based on the systematic analysis of military requirements, the virtual simulation technology is used to analyze and design the system framework, architecture, physical structure and application mode of the small arms simulation training platform in detail, and to build a virtual shooting training platform with changeable terrain, diverse climate, complex enemy situation and real experience, which provides a real combat simulation training environment for shooting training subjects. The results show that the platform meets the special requirements of shooting skill training for diversified battlefield environment and actual combat target setting. It not only enables the trainees to train in the possible battlefield environment in the future, but also makes the training process closer to actual combat, and innovates the shooting teaching and training mode.