In order to solve the depth， scope and velocity problem of resource sharing in a power information system， an information sharing scheme based on location-index is proposed. A bit-based array as the index for location of nodes in the State Power Information Network（SPInet） based on the hierarchical topology is described. By publishing redundantly and aggregating the location indices， a fast and exact orientation for target nodes based on multi-channel is realized. The performance analysis and simulation experiments illustrate its efficiency， reliability and completeness. Meanwhile， less system resources are used.