The atmosphere box furnace uses a resistance wire as a heating element, and the furnace is made of alumina polycrystal fiber material, which can quickly rise and fall temperature, and can reach 1000 degrees in 30 minutes. The outer casing is sealed, the cover is sealed with a silicone pad, and the furnace door is made of silicone pad and has a water-cooling system. The gas passes through the flowmeter and then enters and exits through the back. There are multiple inlet ports, which can pass protective gas such as argon gas and nitrogen. The furnace has the advantages of temperature field balance, low surface temperature, fast temperature rise and fall, and energy saving. It is an ideal product for universities, research institutes, industrial and mining enterprises to do atmosphere protection and sintering, and to reduce atmosphere. With its unparalleled cost performance, compact furnace has been widely used in the laboratory.