With the progress of society and the development of the times, the level of science and technology has been significantly improved and widely used in various fields. In the context of big data, the application of information technology has provided certain convenience for various industries, which can not only improve work efficiency, but also improve work quality. Therefore, internal managers and financial personnel of enterprises should give full play to the advantages of big data, enhance the awareness of big data while reforming and innovating, and cultivate more professional and versatile talents. Enterprises should actively integrate the big data system, establish a more complete financial management model, and achieve win-win economic benefits and management efficiency. This paper analyzes the challenges faced by enterprise financial management under the background of big data, and discusses the reform strategy of enterprise financial management.