Cold rolling is a process from the raw material (hot rolled coils) to the finished products of specific thickness by rolling at room temperature. Depending on the metal properties and thickness requirements of cold rolled coils, the cold rolling process can be divided into one-time rolling, two-times rolling and various-times rolling. The hardness of metal can be higher during the cold rolling process and the metal should be annealed in order to keep rolling. Prior to the whole cold rolling process, we have to confirm several parameters affecting the rolling process: overall processing rate, allocation of rolling process and the rolling speed.