An impact-absorbing system of a steering column, which includes a mounting plate, an outer tube, an upper shaft, and a lower shaft. The impact absorbing system includes a mounting plate hole, a curling plate pin, a trans bracket coupled to the outer tube, a trans bracket hole, a curling plate, a curling plate guide, a mounting plate slot, and a curling guide coupling portion fixing the curling plate guide to the trans bracket and moving along the mounting plate slot in the event of collision.