Big data is the take-off wing of financial information service，while financial information service is the foothold of big data. Big data financial information service is the best application scenarios for the integration of big data and financial service. The big data financial information service industry is the representative format of the current financial technology 3.0，as well as a high-level deep integration of big data and financial service industry，and it is also an inevitable industry formed under the exponential growth of financial data. The financial industry has the natural foundation to embrace big data. Compared with other industries，big data is more likely to create high-value products and service by mining and analyzing massive financial data. This paper takes the development trends and challenges of big data financial information service industry as the main line. This paper includes six parts：First，it introduces the definition of big data financial information service industry and expounds the four aspects of the industry：highly interactive，highly Innovative，high value-added and highly fault-tolerant；Second，it introduces the rise of big data financial information service industry and discusses typical industry application scenarios：customer segmentation，precision service，risk management，compliance management and fraud identification；Third，it analyzes the important role of big data financial information service industry in economic development from three aspects：resource allocation，financial risk prevention and enhancing the competitiveness of China’s financial industry；Fourth，from the perspective of information technology and financial development，it proposes the development trend of China’s big data financial information service industry in 2019；Fifth，starting from the current situation of industry development，it puts forward the challenges faced by big data financial information service industry；Sixth，combined with the development trend of the industry，it propose suggestions to accelerate the development of big data financial information service industry in response to the challenges.