During the development of today's economy, the digital growth of economy can obviously be promoted by Financial agglomeration, but the quality growth of economy depends on the technological progress, and innovation driven development is the critical factor to make the economic growth sustainable. Then, what is the relationship between financial agglomeration and innovation, the source of economic growth, and whether financial agglomeration can promote innovation and maintain the sustainability of economic growth. This paper systematically combs the relevant articles and finds that the innovation effect of financial agglomeration has not reached a consistent conclusion, and there are obvious industry heterogeneity and regional heterogeneity.