The invention relates to a fabricated prefabricated wallboard, a floor slab and a fabricated prefabricated wallboard and the floor slab connecting structure. The fabricated prefabricated wallboard and the floor slab connecting structure comprises the floor slab and the wallboard, the floor slab is composed of a first light steel frame, a closed corrugated steel plate, a first reinforcing mesh and a first concrete layer, and the wallboard is composed of a second light steel frame, a second concrete layer, a second reinforcing mesh and a corrugated steel plate. According to the fabricated prefabricated slab convenient to assemble, the overall dead weight of the floor slab is reduced, formwork-free construction can be achieved during assembly, the construction speed is increased, and the construction progress is accelerated; and meanwhile, the usage amount of concrete is reduced, the cost is saved, compared with a traditional light steel keel grouting wall, the wallboard is more convenient and faster to install, more time and labor are saved, a large amount of cost and time of manual operation are reduced, and meanwhile, the construction cost is reduced.