The utility model discloses a steel-made large formwork with rotatable outriggers. The steel-made large formwork with the rotatable outriggers comprises a panel, a frame and keels connected to the back of the panel, back arrises connected to the back sides of the frame and the keels and outriggers connected to the keels, wherein each outrigger comprises a cross strut and an inclined strut; one end of each cross strut is detachably connected with a corresponding movable foundation bolt, and the other end is hinged to the lower portion of the corresponding keel; one end of each inclined strut is fixedly connected with the corresponding cross strut, and the other end is hinged to the upper portion of the corresponding keel. The steel-made large formwork with the rotatable outriggers is simple and reliable in structure for that hinge shafts are adopted for connecting the outriggers and the keels so that the outriggers can flexibly rotate along the hinge shafts; when being in place after rotating, the outriggers are limited through surrounding limit pins, so that it is guaranteed that the outriggers cannot rotate freely during hoisting and construction, safety risks are avoided, the construction safety is ensured, the turnover recycling is achieved, and the cost is reduced; the steel-made large formwork with the rotatable outriggers can be prefabricated in a processing factory and can also be assembled at a construction site using local materials, the manufacturing process is flexible, simple and convenient, the use is convenient, and the construction efficiency is guaranteed. The steel-made large formwork with the rotatable outriggers can be widely applied to concrete pouring construction.