A reinforced concrete cubic bearing die shell includes a top plate, a sidewall and a bottom. The top plate, the sidewall and the bottom are connected with each other to form a polyhedron sealed cavity with at least one rod. The invention is characterized in that the rods are composite rods or compound rods of curved line rods, fold line rods, equal section straight rods, variable section solid straight rods, hollow rods with upper opens or variable section hollow straight rods, meanwhile reinforced ribs are also provided on the rods, the rods are connected with each other or the rods are connected with the top plate or the sidewall or the bottom. The reinforced concrete cubic bearing die shell is applicable to various hollow concrete structures such as floors, roofs, base slabs, concrete wall bodies, bridges and so on, in particular to hollow concrete floor engineering.