The 20-high reversible cold rolling mill is suitable for cold rolling and finishing of high-strength strips such as stainless steel, silicon steel and carbon steel, and is the best choice for precision stainless steel strip rolling. The 20-hi RCRM has the advantages of high rolling thickness accuracy, good flatness, and excellent strip shape. The cold rolling mill has a high level of automation, saving labor costs and high efficiency. For rolling stainless steel materials, the reduction rate is above 90%, and the rolling speed is 700 m/min; the maximum reduction rate for rolling carbon steel materials is above 95%, and the rolling speed reaches 800 m/min. The rolling output thickness is as thin as 0.03 mm.