An automatic intelligent power grid partitioning method includes establishing a power grid model; abstracting the power grid into a data structure composed of vertex sets and edge sets; defining partition boundary information according to a topological structure of the power grid; after judging that the changes occur to the topological connection of the power grid, performing the topological search to the power grid model to acquire the partition information; displaying the partition information on display equipment. According to the arrangement, the partition information of equipment in the power grid is rapidly identified, partition combination and splitting is instantly founded, and topological computations are fewer at the premise that instantaneity is guaranteed.