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In order to meet the demand of the army and military colleges for maintenance training of weapons and equipment, and in combination with the development status of virtual reality technology, system structure characteristics designed equipment maintenance training system based on virtual maintenance technology. The key technologies of 3D design, maintenance process design, collision detection and interaction mode are studied. The functions of role management, virtual maintenance demonstration and training, maintenance information recording and so on are realized, which include learning, training and evaluation. Finally, the system is applied to a weapon device. The results show that the system can meet the needs of users in the field of equipment maintenance training, effectively improve the efficiency of equipment maintenance, and provide a new feasible method for equipment maintenance training.