The invention relates to a vertical pinch correction device. The vertical pinch correction device comprises a frame, a supporting base, a support, a rack, two pinch rollers, a hydraulic cylinder and a detector, wherein the supporting base and the support are arranged at the two ends of the frame respectively, one end of the rack is pivoted to the supporting base, a guide rail is arranged on the rack, the two pinch rollers are both installed on the guide rail and used for clamping strip steel, the hydraulic cylinder is fixed to the support, a linear displacement sensor is arranged on the hydraulic cylinder, a driving shaft of the hydraulic cylinder is connected to the other end of the rack, the hydraulic cylinder is used for driving the rack to rotate around the supporting base, the detector is arranged under the rack, the detector is connected to a correction hydraulic unit, and the hydraulic unit is connected with the hydraulic cylinder. The vertical pinch correction device is simple in structure, small in occupied area, light in weight, easy to operate and maintain and obvious in correction effect.