The invention provides a control method and a control device under
continuous casting weight. The method comprises the steps of performing real-time tracking to calculate a
casting blank temperature field, so as to obtain a center
solid fraction of a
casting blank; determining the position of the
casting blank when the weight is performed, wherein the position is in the scope of between 0.6 of the center
solid fraction of the casting blank and 1.5m behind a solidification position; and pressing an upper roller of a withdrawal and straightening roller at
a weighting position so as to weight the casting blank. The device comprises a tracking unit, a determining unit and a roll gap
control unit, wherein the tracking unit is used for performing real-time tracking to calculate a casting blank temperature field, so as to obtain the center
solid fraction of the casting blank, the determining unit is used for determining the position where the casting blanks performs weighting, and the position is in the scope of between 0.6 of the center
solid fraction of the casting blank and 1.5m behind the solidification position, and the roll gap
control unit is used for pressing the upper roller of the withdrawal and straightening roller at the weighting position so as to weight the casting blank. According to the control method and the control device under
continuous casting weight provided by the invention, microstructures and metallographic structures in the center of the casting blank can be improved, the center segregation and looseness of a
continuous casting blank can be effectively reduced, the shrinkage cavity can be eliminated, the pressing efficiency can be improved, and the pressing effect can be stabilized.