Assembling and positioning device for double-wall steel cofferdam with blade feet

The utility model relates to an assembling and positioning device for a double-wall steel cofferdam with blade feet. The assembling and positioning device comprises a base, an inner inclined supporting rod and an outer inclined supporting rod. The base comprises two bearing beams arranged in parallel, a connecting plate is welded between the ends of the two bearing beams, and a limiting plate perpendicular to the bearing beams is welded to the top faces of the two bearing beams. The lower ends of the inner inclined supporting rods are rotationally connected with the two bearing beams through pin shafts; the outer inclined supporting rod comprises an upper section, a lower section and an adjusting screw rod; two ends of the adjusting screw rod are respectively screwed with the lower end of the upper section and the upper end of the lower section; the lower end of the lower section of the outer inclined supporting rod is rotationally connected with the two bearing beams through pin shafts, the upper end of the