Abstract: The tendency of investing virtual economy instead of real economy leads to the slowing down of Chinese economic growth, which has been a new problem. With the rapid development of financial industry and gathering of financial capital in the regional center, can regional real economic growth be promoted with less financing constraint? This is significant for breaking through the economic dilemma. This paper summarizes the studies about definition and evaluation of financial agglomeration, mechanism and empirical study of financial agglomeration's promoting economic growth, for the purpose of providing some experience for the related studies in the future. To test financial agglomeration, Location Quotient (LQ), Space Gini Coefficient (SGC) and Hirschman-Herfindahl Index (HHI) can be used. Besides, an evaluation index system of financial agglomeration can be made in the aspects of quantity of financial institutions, scale of financial assets, population of financial employees, maturity of financial market and operation of financial industry, etc. As financial development, financial agglomeration provides better services for the enterprises; as financial cluster, financial agglomeration promotes capital allocation efficiency, both of which provide better financial support for enterprises to expand production scale, promote R&D and the management. And in this way, can the real economic growth be promoted. Similarly, empirical studies also show financial agglomeration promotes regional economic growth, but mid-small private enterprises may not be benefited equally, which suggests a direction for deepening the financial agglomeration study.