Taking intelligence level as the threshold variable and core variable, the nonlinear relationship between technological innovation and economic growth was empirically studied through the threshold model. The research conclusions show that: Technological innovation and intelligence level have a significant role in promoting economic growth. R&D of scientific and technological innovation input has continued to enhance economic growth with the improvement of intelligence level; scientific and technological innovation output TIM has a significant promotion effect on economic growth when the intelligence level exceeds 23.6561.Scientific and technological innovation output PCP promotes economic growth as the level of intelligence increases,which first strengthens and then weakens. When the intelligence level exceeds 23.6561, R&D, TIM and PCP all have a significant positive effect on economic growth. Therefore, the coordinated development of intelligence and innovation can effectively promote economic growth.