High-grade non-oriented silicon steel is a basic functional material for national economic construction. It is an indispensable soft magnetic alloy in the fields of electric power, energy and military industry. It is mainly used in manufacturing cores and electrical components of generators, large and medium-sized motors, new energy vehicle drive motors and transformers. Its production process is long and the process is complicated. Its manufacturing technology and product quality are one of the important indicators to measure the production level of a country’s special steel. Ultra-thin, high-grade non-oriented silicon steel is widely used in precision high-frequency motors, high-efficiency smart home appliances, new energy vehicles and other fields. With the continuous advancement of national industrial policies in the direction of energy saving, greenness and high efficiency, this steel product has also become an essential high-performance material for new manufacturing industries.