The invention belongs to the field of fine chemical engineering, and relates to a combined production method for an antioxidant RD and an antioxidant FR. The combined production method comprises: adding aniline, acetone and a catalyst into a reactor, heating to 70-150 DEG C, reacting for 4-12 h at the temperature, neutralizing, washing with water and distilling to obtain the antioxidant RD finished product; and utilizing the former fraction during production of the antioxidant RD, under the effect of a catalyst, reacting for 1-12 h at 80-200 DEG C, neutralizing, washing with water and distilling to obtain the antioxidant FR finished product. The method helps to substantially reduce consumption of energy sources such as water, electricity, gas and the like during production of the antioxidant RD, and also is capable of producing the product antioxidant FR with high added value.