The invention discloses a multi-source data multi-dimensional reconstruction method oriented to service market access demand, belonging to the technical field of power consumption behavior analysis and prediction, comprising data extraction and integration, big data storage, big data calculation, big data presentation and big data application. As the magnanimity relate to the business expansion market is large, heterogeneous, multi-source data fusion and governance, to realize the effective integration and information sharing of market access demand data, based on the analysis of multidimensional reconstructed data, Data visualization analysis and data mining algorithm can grasp the distribution and changing trend of business expansion market access demand, improve the accuracy of businessexpansion market access demand analysis and prediction, better serve the power grid planning and construction, improve the efficiency and efficiency of power grid planning, and improve the economy and security of power grid operation.