Abstract: The rolling spalling damage behavior of wheel steel was investigated using a reciprocating rolling testing apparatus under different cycle numbers and frequencies.The damage mechanism was analyzed.The results show that the rolling spalling damage of wheel steel appeared with the fatigue wear.With the increasing numbers cycle,rolling spalling damage would aggravate gradually,and the wear surface became smooth with obvious spalling marks.In addition,wear mechanism of the wheel steel would transfrom from abrasive wear to fatigue wear,and the wear depth increased obviously.The frequency had no obvious effect on the surface worn-out appearance for rolling spalling damage of the wheel steel,which was proportional to the wear depth.