The FCSX-4-14 box-type furnace uses resistance wires, silicon carbon rods, silicon-molybdenum rods, molybdenum wires, etc. as heating elements, combined with intelligent temperature control instruments, and adopts mechatronics design. The furnace adopts a structural model that combines corrosion-resistant materials and energy-saving materials. It is very suitable for universities, research institutes, and material companies to use for process research and development and sample delivery for sintering.