Abstract: The geological data is the most important resource for geological work, and has important value.The huge amounts of structuredand unstructured data is accumulated by the national geological drilling database.An important research issue is how the unstructured geological data can realize the efficient storage and convenient network service.Based on the big data technology and the geological drilling data characteristics, the paper proposes the big data processing framework of the national geological drilling information service system by Hadoop platform, so as to solve the problems which include the integrated management, efficient storage, convenient service, quick query and analysis of the dataetc.This paper discusses the development and node construction of the system, and puts forward the solutions to the geological data service and application problems.