Research works on width compensation and correction were carried out in order to eliminate the effects of the PVPC( plan view pattern control) on width accuracy of plate mill. The thickness correction calculation formula was derived for compensation the width deviation caused by PVPC function,and the formula is unified under the thinning and thickening conditions. In order to improve the width calculation accuracy, width spread calculation process was modified with dividing one large reduction pass to several small reduction calculation steps. The thickness wedge was simplified to rectangle based on the volume constant principle,and the width spread model for PVPC was constructed. The width compensation and correction for the PVPC functions are used for the online control process,and the Product dimension accuracy is improved. With the decrease of crop losses,the product yield was increased with 0. 2%. Research works on width compensation and correction were carried out in order to eliminate the effects of the PVPC (plan view pattern control) on width accuracy of plate mill. The thickness correction calculation formula was derived for compensation the width deviation caused by PVPC function, and The formula is unified under the thinning and thickening conditions. In order to improve the width calculation accuracy, width spread calculation process was modified with dividing one large reduction pass to several small reduction calculation steps. The thickness wedge was simplified to rectangular based on the volume The width compensation and correction for the PVPC functions are used for the online control process, and the product dimension accuracy is improved. With the decrease of crop losses, the product yield was increased. with 0. 2%.