Based on the four-V characteristics,big data not only covers larger amount of private information of clients but also it faces the data storage security risk and exposes the privacy of the civilians.In this case,the risk management strategy includes the privacy invasion management and system design.Technically there is an urgent need to advocate the standard and authorization of the credit rating,as well as the real time monitoring once alert is detected.Also public administration and government support are the solutions to the data acquisition and sharing on the big data financing.