This paper constructs FinTech development indicators of commercial banks through web crawler, and uses the data of 138 Chinese commercial banks from 2013 to 2021 to investigate the impact of the development of FinTech of commercial banks on bank credit risk. The results show that the development of FinTech significantly reduces the credit risk level of commercial banks, among which the application of FinTech in the digital risk control of banks plays an important role in reducing bank credit risk, and the development of FinTech in small and medium-sized banks has a greater inhibitory effect on credit risk.