Abstract: Making full use of information technology to support geological work is a frontier field of geoscientific research. With the launch and development of the new round of prospecting breakthrough strategy, big data information technology is of great significance for carrying out geological prospecting work and constructing geological information databases. The paper discusses the role and advantages of big data in geological prospecting, and summarizes the research methods of data system construction. The construction of big data prospecting database system will provide scientific basis for further exploration. The new round of prospecting breakthrough strategic action is empowered by modern information technology such as big data and cloud computing, which provides a new idea for intelligent construction of prospecting database system.