Abstract: High-speed maglev train is a new mode of transportation. The main speed control system is the propulsion converter system. The converter will produce huge heat during the train operation. Benefit from its stable and reliable cooling system the converter can run smoothly. Based on the principle of Shanghai Maglev train converter cooling system, its application design and redundancy strategy are analyzed. The distributed structure, working principle, functions and efficiency of parameter configuration interfaces are elaborated, suggestions for improving the design according to the practical situations are put forward.