In the fiercely competitive welding market, lightweight and economical welding equipment is increasingly favored. Increasing the operating frequency of the welding machine will greatly reduce the weight of the whole machine, significantly reduce the volume, and significantly reduce the material and energy losses of copper, iron, etc. At the same time, the dynamic response time of the power supply is increased by more than two orders of magnitude, which can bring about improved welding performance. Taking into account the development trend of high-frequency welding machines, on the basis of the previous generation of technology, the IGBT products used in the welding machine field are optimized, the switching loss of IGBT devices is greatly reduced, and the switching speed of devices is improved. Under the condition of the same output power, the switching frequency of the welding machine can be greatly increased, the size of the welding machine can be reduced, the production cost can be reduced, and the overall cost performance of the welding machine can be improved.