Box type annealing furnace is a standard ultra energy-saving periodic operation box type furnace, mainly used for annealing heat treatment of steel parts, various metal parts, automotive accessories, etc. Stainless steel nitrogen inlet pipes and valves are installed on the furnace side to adjust the intake volume, which can provide simple protection for the atmosphere and reduce workpiece oxidation. The box type annealing furnace adopts high-purity and high aluminum energy-saving brick composite lining, and high-temperature and high resistance alloy heating elements are installed on the side walls and furnace bottom. A microcomputer program automatic temperature control cabinet is used to execute the annealing process curve with high precision.