After years of development, the design level, processing and manufacturing technology, mold, and another equipment level of the stator and rotor iron core of electric machines in China have been greatly improved. With the introduction of manufacturing technology from advanced countries in the world and the rapid development of professional manufacturing enterprises for stator and rotor iron cores in China, the production technology maturity of motor iron cores in China has also been continuously improved. Among them, the stamping process and press mounting process technology have been relatively mature, and a certain amount of technical experience has also been accumulated in the research, testing technology, special mold design, and manufacturing of basic materials such as silicon steel sheets. At present, there are a large number of enterprises in the motor iron core manufacturing industry in China, and the scale of enterprises is relatively small. Therefore, the overall level of using high-precision, high-efficiency, and long-life multi-station progressive molds and automated stamping equipment is not high. In recent years, as downstream customers have increasingly higher requirements for the accuracy of motor iron cores and intensified market competition, large-scale enterprises in the industry have also developed towards high accuracy, high production efficiency, high stability, and low energy consumption and consumables in mass production, which has greatly improved the level of molds, automatic or semi-automatic lamination tooling. The development goal of stator and rotor core production technology is to continuously improve the conversion efficiency of electrical and mechanical energy, reduce energy consumption and improve production efficiency. Therefore, the technological development trend of the motor core industry is mainly reflected in the research and development of basic materials, mold design, and manufacturing, improvement of processing technology, and improvement of production equipment level. In terms of material application, the motor core technology is developing towards energy conservation and environmental protection, with continuous improvement in magnetic properties. Based on ensuring product performance, the service life and performance of the motor have been greatly improved; In mold design, motor core stamping technology has developed towards ultra-high precision and higher technology, greatly improving the accuracy of product dimensions and production efficiency; In terms of press mounting technology, the motor iron core technology is developing towards simplicity and efficiency, ensuring the lamination quality of the iron core and reducing labor intensity; In terms of the welding process, the motor core technology has developed towards automation, from traditional manual welding to robot welding, thereby improving welding quality, reducing labor intensity and manufacturing costs; In terms of quality testing, measurement methods have developed towards accuracy, from traditional manual measurement to semi-automatic optical detectors for full-size measurement, improving the level of product quality testing.