Abstract: In the new period of development, China is facing a series of challenges and opportunities due to the profound changes in the internal and external environment. It seems even more urgent to accelerates the promotion of strategic emerging industries represented by the nuclear power industry to take the road of deep military-civilian integration and development, and promote the unification of economic construction and national defense construction. Taking nuclear power industry, a typical military-civilian integration industry, as the research object, the paper adopts the grounded theory to conduct an exploratory analysis of the core categories and mechanism of deep military-civilian integration of China’s strategic emerging industries. The study finds that the deep military-civilian integration of China’s nuclear power industry can be summarized as a highly relevant integration model throughout the entire industrial chain, which takes safety first as the basic requirement, technological innovation as the starting point, integration policy and integration demand pull as the driving mechanism. The research findings can provide practical enlightenment for China’s strategic emerging industries to further implement the strategy of deep military-civilian integration.