A missile equipment distributed virtual collaborative operation training system based on Unity engine is designed. The system can not only achieve multi-user collaborative operation

but also solves the problem of high cost of equipment training

big equipment loss

and large potential safety hazards in army. Distributed virtual collaboration network communication module is designed. Based on the mixed network structure of C/S and P2 P mode

the network promises reliable information transmission

and improves synchronous real time of virtual people. In the Unity engine software

virtual reality（ VR） outer equipment is introduced on the basis of the key frame method to realize the simulation of the virtual collaborative operation training process. The application results show that the system can meet the multi-user cooperative operation

effectively improves training efficiency and reduces training costs.