Turnover folding sofa

The invention relates to the technical field of sofas, in particular to a turnover folding sofa which comprises a sofa seat, a rotating groove is formed in one side of the upper end face of the sofa seat, and the interior of the rotating groove is rotationally connected with a sofa back extending to the outer side of the sofa seat through a rotating assembly. A locking assembly which is movably clamped with the rotating assembly is movably inserted into the outer side end face of the sofa seat, sofa armrests are rotationally connected to the left side and the right side of the sofa back on the upper end face of the sofa seat through hinge assemblies, and rotating grooves are formed in the left side end face and the right side end face in the rotating groove; the two sets of rotating discs are rotatably connected to the interiors of the two sets of rotating grooves respectively, rotating shafts extending into the rotating grooves are fixedly connected to the outer side end faces of the two sets of rotating gro