Abstract: With the continuous deepening of the enterprise strategic goals and the rapid development of new information technology, current running power grid GIS platform has been unable to meet the huge business needs. The research and design of power grid GIS middle platform is carried out in view of the problems of repeated construction of power grid, marketing and other GIS platforms, non-transaction of business data, non-standard data specification and tight coupling of business modules. This paper relies on the design concept of the business middle platform architecture, precipitates the shared data of various professions, carries out the research and design of the functional architecture, physical architecture and logical architecture of the power grid GIS platform, to realize the normalization of the power grid GIS platform, data standardization, real-time map and efficient business, providing strong support for the business needs of various departments of the company.