Nowadays, with the rapid development of network information, the era of big data has come. The group company is developing towards the trend of integration, information and internationalization. The application of big data in the financial management of group companies is the top priority in the economic development of our country. With the advent of the era of big data, the construction of financial management information is very important, but there is still a lot of room to optimize the financial management mode of domestic group companies to improve the effectiveness of financial decision-making and management. This paper analyzes the current situation of financial management informatization construction under the background of big data, the influence of big data on the group's financial management, and how to apply it in financial management. The research in this paper provides relevant theoretical guidance for group companies to conduct financial management under the background of big data. Meanwhile, the construction of financial management informatization conforming to the development of big data era is of great significance to improve the overall benefits of group companies.
Key words: group company; Informatization; Financial management; Big data