Nuclear power station double-web beam correcting tool and correcting method thereof

The invention discloses a nuclear power station double-web beam correcting tool and a correcting method thereof. The correcting tool comprises multiple mounting frames fixed on an operation platform in parallel; pressing devices are arranged in inner cavies of the mounting frames; the pressing devices are fixed with the top surfaces of the inner cavities of the mounting frames, are positioned above the operation platform, and can move along plumb lines; a flame heating device is arranged on the working platform; and a heating place of the flame heating device is positioned on webs of parts tobe machined. Waste steel plates are used for assembling the tool; the tool number is selected according to the component deformation degree; principles and characteristics of thermal correction and mechanical correction are fully used in the correcting process, and thermal correction and mechanical correction are combined for synchronous acting to solve once molding difficulties in web correctionof double web beams and to