This work is based on advanced Unity technology to design and implement air defense and anti-missile combat scenarios. In the scene, the satellite monitors the ground situation in real time, and when the enemy missile is detected, it launches the signal to the base; when the base receives the signal, it can effectively launch the missile to intercept by deducing the trajectory of the enemy missile. The work integrates the relevant knowledge of missiles, combines scene construction, special effects design, perspective switching, collision detection and other contents, can present the process of air defense and anti-missile operations in real time, and can provide relevant operation data.