The invention relates to an orange-flavored additive containing polymethoxyflavone and a preparation method thereof. The preparation method comprises the following steps: a, mixing a wall material rawmaterial and water to prepare a wall material solution with the solid content of 40 to 70 weight percent; b, mixing the polymethoxyflavone and orange oil to obtain an oil-phase mixture; mixing the oil-phase mixture with water and an emulsifier; shearing and homogenizing to obtain orange oil emulsion; c, mixing the wall material solution in step a and the orange oil emulsion in step b according tothe mass ratio of 1 : (2 to 6) to obtain mixed emulsion; d, spraying and drying the mixed emulsion to obtain polymethoxyflavone microcapsules; e, mixing the polymethoxyflavone microcapsules in step dwith an anti-sticking agent to obtain the orange-flavored additive containing the polymethoxyflavone. The powder prepared by the method has an obvious orange flavor and has high polymethoxyflavone encapsulation rate and good stability and can sufficiently realize the effects of resisting cancers, resisting inflammation, resisting atherosclerosis and the like when being used in foods.