Abstract: In view of problems that system configuration information management module of software for informatization of coal mine could not be reused and maintenance and upgrade of the software were difficult, a system configuration information maintenance component was designed. In this paper, characteristics of system configuration information were analyzed and the information was divided into multi-value configuration and single-value configuration. The overall design, functional design and main process design of the component were also given. The component stores configuration information in file with fixed format, which avoids change of the whole software caused by migration of configuration data. It provides interfaces for external programs to access data, which realizes maintenance of a variety of configuration data. The actual application showed that the component reduces workload of software development and complexity of software maintenance and upgrade.