The utility model provides a prefabricated member structural slab which can be widely applied to residential buildings. The prefabricated member structural slab comprises a lattice steel bar compositefloor slab and a composite wallboard, and can be widely applied to structural building construction, such as residences and underground garages; the structure comprises a lattice steel bar compositefloor slab and a composite wallboard, bottom ribs are arranged in the composite floor slab and the composite wallboard; ribs are distributed inside and outside the wallboard. By the adoption of the prefabricated part structure plate, a large-platform line production mode can be adopted, and customized production is not needed; the system is suitable for overground buildings such as residences; thedevice can also be suitable for underground structures such as underground garages; aiming at an overground residential structure, a large free space can also be designed; and the limitation of construction conditions is avoided.