The invention relates to the technical field of graph database query, and specifically relates to a power grid graph database query method and device, and the method comprises the steps: obtaining a to-be-queried source point and a to-be-queried destination point; based on a preset power grid graph, determining the same key node passed between the to-be-queried source point and the to-be-queried destination point; wherein the preset power grid graph comprises a plurality of nodes, edges connected with the nodes and a single-source shortest path between the key nodes; wherein the nodes are usedfor representing equipment in a power grid, and the edges are used for representing a topological relation between the equipment; wherein the key nodes are nodes corresponding to preset equipment; and forming a shortest path between the to-be-queried source point and the to-be-queried destination point by using the determined single-source shortest path of the key node. According to the method, the key nodes are arranged in the preset power grid graph, and the shortest path between the to-be-queried source point and the to-be-queried destination point is formed by utilizing the single-sourceshortest path of the key nodes, so that the query time of the power grid graph database is shortened, and the query efficiency of the power grid graph database is improved.