The invention discloses a recyclable steel-skeleton model-house system which comprises a base (1), square tubes, three-way connectors (3), four-way connectors (5), a top connector (6), a C-type connector (7) and C-type steel (8), wherein the base (1) is fixed on the ground, the square tubes are fixed above the base (1), and the square tubes are connected by the three-way connectors (3) and the four-way connectors (5) so as to form a wall-surface skeleton system; the top connector (6) is arranged above a square tube (close to the top surface) of the wall-surface skeleton system; and a top-surface steel-skeleton system comprises the C-type steel (8), and the C-type steel (8) is connected to the top connector (6) by the C-type connector (7). By using the system disclosed by the invention, the construction time of a steel skeleton base-layer can be shortened, the material consumption can be reduced, the cost can be reduced, and safety accidents such as noise pollution and fire disasters and the like caused by field cutting and welding are avoided.