Abstract: Based on the project of efficient production line, this paper aims to propose an improving A* path planning algorithm which is applied to the motion control of AGV. After detecting obstacles, it can be used in real-time path planning. So the safety of AGV robots application is improved without affecting the efficiency of transport. In this paper, the working environment of the AGV robot is analyzed, and the environmental model is established. Then the traditional A* algorithm was explained and analyzed, and the improvement measures were put forward for its shortcomings. Finally, the validity of the algorithm is verified by simulation.