Abstract: In the decade of the new era, China’s technology of 20-high rolling mills has made rapid progress,with breakthroughs in key components.In order to objectively analyze the development of domestic 20-high rolling mills in the past ten years and compare their advantages and disadvantages with those of foreign rolling mills, the application of foreign 20-high rolling mills in China, the changes of China’s output and quality of electrical steel and the development of domestic 20-high rolling mill in the past 10 years were mainly introduced in this paper. And the main characteristics and key indexes of the 20-high rolling mill were analyzed.Meanwhile, the properties of domestic 20-high rolling mills at present were compared with that of imported similar models.

Key words: 20-high rolling mill, electrical steel, domestic rolling mill