The invention relates to a centering wheel used for a walking beam furnace. The centering wheel comprises a wheel base, an axle, a wheel body, an axle sleeve and a sealing bearing cover. An opening is formed in one side of the wheel base. The two ends of the axle are supported by and arranged in corresponding supporting holes in the wheel base through two positioning and supporting sleeves. An axle end baffle is arranged at the upper end of the axle. The wheel body is arranged on the axle through a bearing. The peripheral face of the wheel body extends out of one side of the opening of the wheel base. The axle sleeve is arranged between the bearing and the axle. The two ends of the axle sleeve abut against the inner end faces of the two positioning and supporting sleeves respectively. The centering wheel is simple, compact and reasonable in structure and good in centering effect.