Abstract:Automatic profile and flatness control system is composed of shape control software, hardware and network configuration and measuring instrument. As one important part of computer control systems of 1580mm hot strip mills, the functions of automatic profile and flatness control system include shape setup control and its correlative shape self-learning in process control system, bending force feedforward control, crown feedback control and flatness feedback control in basic automation system. After the basic design, detail design, programming, debug and adjustment of model parameters, automatic profile and flatness control system run stably. The widest strip with 1510 mm and the thinnest strip with 1.45 mm were produced successfully. The deviations of strip crown and flatness in a rolling unit were less than ±15μm and ±20IU respectively.