Abstract: Based on an endogenous growth theory, a model involving technology mport for the secondary innovation endogenous system is constructed to analyze the scale of secondary innovation. The scale of secondary innovation is discussed. The results reveal that the effect of the technology import quality on the secondary innovation is uncertainty, the effect of the number of the participants on secondary innovation is also uncertainty, the effect of R&D efficiency on secondary innovation is positive, and the effect of R&D spillover on the secondary innovation is negative.