SG-CIM defined by the State Grid Corporation of China provides unified specification for common information modeling and information interaction, which is convenient for information integration between different systems and applications. Based on the existing SG-CIM model, with the demand of distribution power system, the class, attribute and relationship are extended. In order to overcome the influence of security division to information interaction, the data aggregation platform is established in safety zone III. The integration platform is established based on data aggregation platform. Based on unified data source, the integrated platform is constructed. The object is aggregated on the basis of business requirement. The real time data platform is constructed to enhance data transmission speed. Depending on GIS and according to the distribution business process, information across systems are integrated and several senior applications are developed. They are running well in actual engineering projects.