The utility model provides an antioxidant adding device, which belongs to the technical field of noodle processing and comprises a return pipe arranged on the outer side of an oil drum and communicated with the oil drum, a plurality of stirring tanks arranged on the return pipe and used for mixing an antioxidant and oil, and a circulating pump arranged on the return pipe, an inlet of the return pipe communicates with the bottom of the side wall of the oil drum. An outlet of the return pipe communicates with the top of the side wall of the oil drum. A valve is arranged at the inlet of the return pipe; the circulating pump is positioned between the stirring tank and the inlet of the return pipe. The utility model provides an antioxidant adding device. Palm oil in the oil drum is extracted from the bottom; the palm oil enters the return pipe, then enters the plurality of stirring tanks in sequence, and is mixed and stirred with the oxidant added into the stirring tanks, so that the oxidant is fully dissolved in the palm oil, the palm oil added with the antioxidant flows into the oil drum from the outlet of the return pipe, the palm oil in the oil drum is stirred, and the oil drum heats the palm oil more uniformly.