The invention discloses a bumper of an imitating-ox-horn structure. The bumper of the imitating-ox-horn structure is composed of a bionic beam and bionic crash boxes; the bionic beam is composed of a bionic outer plate, a restrained beam, diaphragm plates, a side panel and an inner plate; the restrained beam is arranged between the bionic outer plate and the inner plate, two sides of the bionic plate and the inner plate are connected through the side panel, multiple diaphragm plates are uniformly distributed on the two sides of the restrained beam, and the two bionic crash boxes are fixed on the two outside ends of the inner plate respectively; each bionic crash box is composed of an outer shell and a core, each outer shell is composed of a drum-shaped outer pipe and two constraint walls which are inserted at interval, and a plurality of first constraint plates are connected between two constraint walls and between the drum-shaped outer pipes and the constraint walls; each core is composed of a central circular pipe, a plurality of circular pipes and second constraint plates; the plurality of second constraint plates are connected between the plurality of circular pipes of the cores, and the outer shells and the cores are connected through the second constraint plates. The bumper of the imitating-ox-horn structure improves the axial-direction energy absorption ability of the crash boxes, and the beam structure of the bumper is improved to make the bumper has good horizontal carrying capacity.