Plate hydraulic bending deformation keeping system

The utility model relates to a hydraulic bending deformation keeping system for plates. The device is characterized by comprising a supporting bedplate, a deformation keeping module, a hydraulic cylinder, a pressing block, a hydraulic module and a retainer, a guiding T-shaped groove is formed in the supporting table plate, and the deformation maintaining module is embedded into the T-shaped groove so that the position can be adjusted; according to the deformation maintaining module, the holding frame is arranged on the plate in a crossing mode, the C-shaped buckles on the holding frame are matched with the limiting pin pieces on the deformation maintaining module, and the C-shaped buckles are hooked through the limiting pin pieces, so that the pressure of the hydraulic cylinder can be removed, and the plate in the bent state is tensioned by the holding frame; line contact of the plates in a bending state is changed into surface contact through the inclination angles of the inclined plates, friction force is i