The invention discloses a path finding algorithm based on magnetic-navigation meal delivery. The path finding algorithm comprises the following steps: A, setting a dining room layout according to positions of dining-tables and magnetic stripe rails in a dining room; B, adopting a topological graph to show the dining room layout; C, storing topological data through a digraph data structure; and D,finding a path between any two points. The path algorithm shows dining-table layout through the topological graph which is easy to expand, so that the dining room layout is conveniently managed by a dinning room administrator; all sites can be scanned through a depth-first search algorithm, and the shortest path can be effectively selected according to the total number of the path sites; and a recursive algorithm is adopted, so that the structure is clear and readability is strong.