The invention relates to a power distribution multi-source heterogeneous information model data system. The system is a tile-pyramid model which comprises a basic data layer, a calculation analysis data layer, a decision management data layer and a planning data layer, wherein the basic data layer, the calculation analysis data layer, the decision management data layer and the planning data layerare arranged in sequence from bottom to top; and after the upper-layer data layer is analyzed and obtained from the lower-layer or same-layer data layer, each block of data of each layer is continuously classified according to a compact degree between pieces of data. Compared with the prior art, the system has the advantages that the comprehensiveness and integrity description of an information model for multi-source heterogeneous data can be guaranteed, meanwhile, a data incidence relationship is enhanced, and the data reusing and sharing efficiency of the information model can be improved.