The invention discloses a full-automatic metal plate cutting device which comprises a workbench, a movable roller conveying assembly, a static roller conveying assembly, a transmission assembly, a cutting assembly, a fixing assembly, a conveying assembly and a collecting assembly. A first groove, a second groove and a third groove are formed in the vertical plate, a first rotating shaft is rotationally installed in the first groove, and a second rotating shaft is rotationally installed in the second groove. According to the full-automatic metal plate cutting device, through cooperation of the workbench, the movable roller conveying assembly, the static roller conveying assembly, the transmission assembly, the cutting assembly, the fixing assembly, the conveying assembly and the collecting assembly, cutting of a metal plate is completed, full-automatic cutting is achieved, manual operation is not needed, then the cutting time is shortened, and the cutting efficiency is improved.