The development level of port finance has an important influence on the development of port economy. Under the background of the new economy and the construction of the 21st century Maritime Silk Road, the increasingly close economic and trade cooperation has put forward higher requirements for the financial development level of Shanghai Port. This paper takes Shanghai Port as the research object, analyzes the financial development level of Shanghai port by constructing Levin index, and takes the financial activity and financial scale of Shanghai Port as the dependent variable, selects the representative port container throughput and urban GDP of the financial environment factors and deposit and loan ratio of the financial system factors as independent variables. Then the VAR model is established to explore the influence of financial environment and financial system on the financial development level of Shanghai Port. The results show that the above-mentioned independent variables have positive effects on the financial activity and financial scale of Shanghai Port, and all have some lag. It shows that the level of financial development in Shanghai Port on the port of the financial environment and financial system has a certain dependence. Finally, according to the research results, some suggestions are put forward to improve the financial development level of Shanghai Port.