The invention discloses an asphalt mixture oxygen-deficient mixing device having the effect of slowing down asphalt aging. The asphalt mixture oxygen-deficient mixing device is characterized in that the side of an agitating kettle is communicated with an exhaust gas pipe; the exhaust gas pipe, a first pipe and a second pipe form a three-way structure; the first pipe is communicated with a drying roller chimney of an asphalt agitating station; the second pipe is communicated with a chimney of an asphalt heat-conduction oil boiler; a first induced draft fan, a first stop valve and a dehumidifier are arranged in the channel of the first pipe; and a second induced draft fan and a second stop valve are arranged in the channel of the second pipe. The asphalt mixture oxygen-deficient mixing device utilizes exhaust gas produced by asphalt concrete agitating station production to pre-heat the asphalt concrete agitating kettle, and improves and relieves aging (oxidation) produced in asphalt mixture agitating.