The invention discloses a straightening machine traveling wheel. The straightening machine traveling wheel comprises a rolling wheel, a shaft penetrating through the center of the rolling wheel, nuts and check rings, wherein the nuts and the check rings are arranged on the shaft in a sleeving mode to play a fixing role; a ball bearing and a plane bearing are arranged between the rolling wheel and the shaft, the rolling wheel is connected with the plane bearing through the ball bearing, and the check rings are connected with the inner ring of the ball bearing. The nuts comprise the hexagon nut and the round nut which are connected to the two ends of the shaft, elastic washers are arranged on the inner side of the hexagon nut and the inner side of the round nut respectively, the sealing effect is achieved, and the rolling wheel can be fixed conveniently. According to the straightening machine traveling wheel, by means of the check rings and the plane bearing, the problems of axial movement and disengagement of the rolling wheal are solved, the fault rate is decreased, the check rings are adopted to replace a shaft step, the problem that the rolling wheel shaft is inconvenient to maintain and disassemble is solved, the maintenance efficiency is improved, and the stability of machine body running is improved.