“Ordi” Fire-resistant partition wall is made of lightweight fire-resistant wall which is composed with fire-resistant materials such as light steel keels, inorganic fiberglass-reinforced decorative boards and aluminum silicate wools by taking the light steel keels as its frameworks, inorganic fiberglass-reinforced decorative boards as its wall surfaces and aluminum silicate wools (or rock wools) as stuffing for inner walls. It is characterized by excellent fire resistance. 100mm thick fire-resistant wall has been tested by the National Center for Quality Supervision and Inspection of Fixed Fire-extinguishing Systems and Fire-resistant Components and its fire-tolerance has reached 4 hours.