Abstract: With the rapid improvement of equipment and technology in the shipbuilding industry, welding robots have gradually become the main force of processing. In the face of increasing production demand, the shortcomings of insufficient intelligence and difficult operation of industrial robots are gradually exposed, which makes the transformation of enterprises into a dilemma. The development of the shipbuilding industry urgently needs intelligent and easy-to-use welding robots. In the study, we design a no-coding welding robot control system. By optimizing the iterative closest point algorithm, submillimeter-level positioning accuracy is achieved.