Cold mills can process 6-10mm aluminium sheet and board into aluminum board with all kinds of width and thickness by many times of casting. These processed material can be offered to produce sheet, strip, roller, can, PS sheet, foil, and precision raw material for further processing. According to the gauge of the production, it can be divided into cold heavy rolling mill and cold finishing rolling mill; While, by the stand type, it can be divided into four-high or six-high cold rolling mill and universal cold mill.