Abstract: The traditional equipment maintenance training method is limited by venues, resources and equipment, which is difficult to provide an immersive and efficient training environment for the crew. This paper puts forward the idea of establishing a ship equipment maintenance support training system under the metaverse by using extended reality (XR), Internet of Things, artificial intelligence and other technologies. The functional modules and structure of the system were designed, and conceiving to realize the immersive disassembly training of equipment, fault diagnosis and troubleshooting training and multi-person online collaborative training under metaverse. The difficulties and solutions in implementing the system were analyzed. It provided a new idea and design reference for ship equipment maintenance training and other military system construction.