ROLLING ROLL AND ROLLING SYSTEM COMPRISING SAME

An embodiment of the present invention provides a rolling roll which is improved to provide a greater rolling reduction under a limited capacity of a rolling mill and to enable the penetration of deformation to the center of the thickness of a material to be rolled irrespective of the width change of the material to be rolled, and a rolling system comprising the rolling roll. The rolling roll according to an aspect of the present invention has a structure in which the diameter thereof varies from the roll side to a barrel, the rolling roll comprising: a first pressurization part formed at the center of the barrel so as to be in contact with the center of the material to be rolled; a second pressurization part which forms a first inclined curved surface on both sides of the first pressurization part, has a diameter continuously reduced to be smaller than that of the first pressurization part, and has a stepped portion; and a third pressurization part which forms a second inclined curved surface on both sides of the second pressurization part, has a diameter continuously reduced to be smaller than that of the second pressurization part up to the edge of the barrel, and has a stepped portion.