Abstract: Metaverse provides new opportunities for combat deduction because of its features of strong immersion and virtual reality. Starting from the needs of deducting the combat command and decision-making, according to the main characteristics of the metaverse, the key points of metaverse enabling combat deduction are discussed; the architecture and the key technologies of combat deduction of metaverse are explored; the application scenarios of combat deduction of metaverse and the application prospects for future wars are discussed in detail. With the support of metaverse, combat deduction will be in a new form, including four core functions such as situational awareness of embodied experience, intelligent decision-making of virtual and real fusion, deep immersed deduction evaluation, and command and control for cross-domain collaboration. It has outstanding application advantages in actual military training and virtual-real collaborative operation, etc.