In order to analyze the function of finance in regional economic development, theoretical analysis and empirical analysis are used. The theoretical analysis proofs that finance plays an important role in regional economic development. Unit root test and Granger causality test are used in the empirical analysis. The test results: indicate that financial support can promote economic growth. The suggestions of strengthening financial support for regional economic development include: establish a good financial ecological environment; perfect local financial laws and regulations; strengthen policy-oriented financial support to improve the industrial optimization, etc.