The invention relates to a supporting adjustment device, in particular to a self-adjustment supporting structure. The self-adjustment supporting structure comprises a keel, a supporting plate, a bolt rod, a first adjustment nut, a first gasket, a bolt through hole, a second gasket, a second adjustment nut, a first vertical rod, a first support, a second support, a second vertical rod and a transverse rod, wherein threads are formed on the outer surface of the bolt rod; one end of the bolt rod is fixedly connected with the center of the bottom of the supporting plate, and the other end of the bolt rod penetrates through the first adjustment nut, the first gasket, the bolt through hole, the second gasket and the second adjustment nut in sequence. The self-adjustment supporting structure has the advantages that contact between a wall body and a terrace is separated, so that the levelness of the keel can be conveniently and quickly adjusted; the self-adjustment supporting structure is easy to manufacture, mount and operate.