Abstract:Original bridge crane exactly likes intelligent robot path planning algorithm of road king planning method, and the gotten optimal path can not satisfy peoples needs in the practical application, which leads to the consumption of automatic transfer time longer than manual transfer. After analyzing the characteristics of bridge crane operation system, through the grid method to limit the optimal path of corner angle, at the same time, converted inflexion point number to a length of the path, finally the shortest optimal path was gotten. Through the simulation and experiment, and compared with the original method, it proves that the improved algorithm can improve the efficiency of bridge crane automatic transfer in the link of path planning.