The aluminum alloy aging furnace is a periodic operation type resistance furnace, which is mainly used for aging treatment after quenching of aluminum alloy castings, and can also be used for heat treatment of other workpieces in air below 300 ° C. The furnace has a good thermal cycling state and a uniform temperature. The temperature control system adopts PID zero-crossing triggering thyristor, high precision and intelligent meter temperature control. The furnace has good stability and dual control of over temperature alarm to ensure that the workpiece is not over temperature. The frame of the furnace shell is welded with profiled steel. The inner and outer walls are made of high-quality cold-rolled steel plates with a small thermal deformation coefficient. The lining is made of aluminosilicate refractory fiber needle-punched cotton as heat insulation and insulation material, which reduces the temperature rise of the furnace wall. The furnace door and furnace shell are also welded with steel as the frame, and the outer wall is also made of cold-rolled steel plate.