The utility model discloses a self-aligning riding wheel, comprising a riding wheel hub. The riding wheel hub is divided into an inner ball hub and an external ball hub; and the external circumferential surface of the external ball hub is sheathed with the inner ball hub and clearance fit is formed between the inner ball hub and the external ball hub. The external circumferential surface of the external ball hub is a spherical surface and the spherical surface central point of the external ball hub coincides with the central points of the inner ball hub and the external ball hub. The inner wall of the inner spherical surface is provided with a raceway which fits the spherical shape of the external ball hub. The inner ball hub can rotate by 360 degrees relative to the external ball hub. A limiting component which can limit the rotation position of the inner ball hub on the external ball hub is arranged between the inner ball hub and the external ball hub. The self-aligning riding wheel comprises the inner ball hub and the external ball hub. The inner ball hub can rotate by 360 degrees relatively, and thus the inner ball hub can make corresponding rotation along with a furnace body when the furnace body deviates during rotation. Therefore, full contact between the riding wheel and a rolling ring in the axial direction can be realized to achieve the aims of self-aligning and protecting riding wheels.