The invention discloses a multi-source big data fusion urban power grid planning method, and belongs to the technical field of power planning. The invention provides a method based on urban electricity users, combined with urban micro-population, building area and other information to calculate the power load of the space block, and gives a method for planning the urban power facilities, which canstart from the micro level and plan the middle level. Further verification, combined with a variety of micro data to assist in the verification of land load forecasting, can be more accurate and accurate for the future expansion and expansion of power facilities planning, and save resources, but also economically save costs. The final result is integrated into the power planning platform, which facilitates the correction of future plans and the tracking of the implementation of the plan, and can scientifically and effectively grasp the implementation of future plans.