The non-oriented silicon steel sheet is a kind of hot rolled billet or continuous casting billet with a thickness of about 2.3 mm. In the manufacture of low silicon products, the hot rolled strip is pickled and cold rolled to 0.5 mm thickness once. In the manufacture of high-silicon products, hot-rolled strip is pickled (or normalized at 800-850 ° C before pickling) , cold-rolled to 0.55 or 0.37 mm thickness, annealed at 850 ° C in a continuous furnace with hydrogen-nitrogen mixed atmosphere, after 6-10% small reduction rate cold rolling to 0.50 or 0.35 mm thickness. The cold rolling with this small reduction rate can increase the grain size and reduce the iron loss during annealing. Both cold-rolled plates were annealed at 850 ° C in a continuous furnace in a 20% hydrogen-nitrogen mixture atmosphere and then coated with phosphate and chromate insulating films. After cold rolling to finished thickness, the supply state is mostly 0.35 mm and 0.5 mm thick steel strip. BS of cold-rolled non-oriented silicon steel is higher than that of oriented silicon steel.