Technology innovation plays an important role in promoting the regional economic development. On the basis of summarizing the predecessors' research results, this paper qualitatively analyzed the mechanism of technology innovation to promote regional economic growth. Firstly, the paper analyzed the positive influence to the regional economic development of technology innovation from macroscopic level. And then, revealed the micro mechanism of technology innovation to promote the regional economic growth. Finally, an interactive model containing the technology innovation and the regional economic growth is established, pointing out that technology innovation is the fundamental strength to promote industrial upgrade and the development of regional economy, and the regional economic development provides innovation environment and innovation network for technology innovation through the agglomeration effects.