Based on the analysis of previous research, financial development and economic growth are mutually reinforcing. Northern key economic region such as the Bohai Sea region's economic growth and financial development causes for concern. Paper on the Bohai Sea area on the scope of the definition of the statistical analysis method, in general, and internal structure of the Bohai Sea region's economic growth rate and level, but also on economic and financial level, the financial intermediary market level and insurance reflect market conditions and other key indicators of financial development analysis, economic growth reached the Bohai Sea region with the overall level of financial development are closely related, the Bohai Rim area of financial linkage mechanism should be established to drive the Bohai Sea area to enhance the overall level of financial development.