Abstract: The research of technological trajectory has long been the leading topic in the field of technological innovation. However, it still lacks an overall discussion on the relationship between the transition of industrial technology trajectory and the evolution of technological innovation. Based on the needs of strategic transition and the construction of industry safety in China, this article expounds the formation and evolution mechanism of industrial technology trajectory. Then the paper introduces the theory of level transition to explain the evolutionary regularity of technology trajectory, and further reveals the motives, types and trigger conditions of technical track transitions. Above these, the paper puts forward the level transition process model of industrial technology trajectory’s evolution, and hopes to make a new attempt to characterize the development of industrial technology innovation.