Shape correcting equipment and method for hot-press formed steel plate welded hollow guide vane

The invention discloses hot press forming steel plate welding hollow guide vane shape correcting equipment which comprises a clamping part, a shape correcting spanner and a line inspection ruler, the clamping part comprises a base, a lower clamping plate and an upper clamping plate, the base is provided with the lower clamping plate, the two ends of the base extend upwards to be provided with sliding grooves, and the upper clamping plate can move up and down along the sliding grooves; the bottom edge of the upper clamping plate is provided with a clamping groove through which a wire inspection ruler can pass; the method comprises the steps that S1, the guide vane is placed into a hydraulic mold after being welded with an air outlet edge; s2, the guide vane is subjected to shape correction through a hydraulic machine; s3, according to the radian of the inner cambered surface of the guide vane to be corrected, a lower clamping plate matched with the guide vane to be corrected is selected; s4, a lower clamping p