The invention discloses an ejection device of an aluminum bumper mold. The ejection device comprises a first inclined ejection mechanism used for demolding of the reversed edge of an automobile bumper (1), a second inclined ejection mechanism used for demolding of the inclined side wall at the position of a lampshade panel of the automobile bumper (1), and a mold discharge assembly used for containing the first inclined ejection mechanism and the second inclined ejection mechanism. The lower end of the first inclined ejection mechanism is fixed to a top plate of a mold ejection mechanism, and a molded surface of the reversed edge of the automobile bumper (1) is arranged at the upper end of the first inclined ejection mechanism. The lower end of the second ejection mechanism is a free end and connected in the mold discharge assembly in a sliding manner, the upper end of the second inclined ejection mechanism is connected with the first inclined ejection mechanism through a linkage mechanism, and the molded surface of the inclined side wall at the position of the lampshade panel of the automobile bumper (1) is arranged at the upper end of the second inclined ejection mechanism. After the structure is adopted, because the lower end of the second inclined ejection mechanism is connected in the mold discharge assembly in the sliding manner and the upper end of the second inclined ejection mechanism is connected with the first inclined ejection mechanism through the linkage mechanism at the same time, the whole mold can be simpler in structure and smaller in size.