At present, big data technology has been widely used in the financial management of Alibaba Group, mainly in the analysis and collection of information, financial supervision and other aspects. However, there are still many problems in the process of applying big data technology in Alibaba Group's financial management, such as insufficient system security, disconnection of financial information, and lack of talents. Only by discovering problems and paying attention to them, so as to dig out the causes of problems, can we solve the problem fundamentally.