The invention discloses an ISOFIX (International Standards Organization FIX) hook, and provides an energy-absorbing ISOFIX hook which has a simple structure, is convenient to use, and is deformed for consuming the kinetic energy of a child passenger in the front face collision process of an automobile to effectively protect the safety of the child passenger. Due to the adoption of the energy-absorbing ISOFIX hook, the technical problems that the energy absorbing effect is poor because only a safety belt can be used for absorbing collision energy during front face collision of the automobile, the child passenger gets injured or dies easily in the collision process and the like existing in the prior art are solved. The energy-absorbing ISOFIX hook comprises a clamping groove positioning seat which is fixedly arranged on the back side of back row seats of the automobile, wherein the clamping groove positioning seat is provided with a strip-shaped sliding chute pointing to the front side of an automobile body; an ISOFIX hook which is connected with a child automobile seat is connected in the strip-shaped sliding chute in a sliding way; a plurality of circles of deformation energy-absorbing sheets are wound on the ISOFIX hook; the inner side ends of the deformation energy-absorbing sheets are connected to the outer edge surface of the ISOFIX hook in a sliding way; and the outer side ends of the deformation energy-absorbing sheets are fixedly connected with the clamping groove positioning seat which corresponds to the inner side end of the strip-shaped sliding chute.