Because of the characteristics of decentralization，non-tampering，and traceability，blockchain technology has the natural advantage of being integrated with the banking industry. Problems in traditional bank like asymmetry of information，lengthy transaction process and low efficiency can be handled well under current financial technology level. At present，major domestic banks have deployed blockchains，focusing on cross-border payment，digital currency，trade finance，supply chain finance and other fields. However，the blockchain technology still has bottlenecks in terms of security，privacy，storage，and underlying framework. Besides，there is no unified standards and related laws to supervise and restrict the blockchain technology. Therefore，we still need to actively carry out relevant research on the underlying technology of blockchain，gradually clarify industry standards and regulatory mechanisms，and strive to explore the applicable scenarios of blockchain in the banking industry. Blockchain is an important support for banks to build a digital ecosystem，will accelerate the digital transformation and upgrading of our country’s commercial banks.