In order to protect the geological relics effectively and carry out geological science education, avoid baseless assertion, this paper investigated and studied the newly found "ice moulins group" at the southern Dabieshan area, which is the boundary area of Hepu Town and Jiuzihe Town of Luotian County, Hubei Province. Based on the analysis of the distribution and features of the "ice moulins group", the authors considered that the "ice moulins group" in the valley of Dabieshan area is formed by the erosion of the stream. The distribution of the "ice moulins group" is controlled by the joint system and its rebuilding and destroying are strongly effected by the stream downcut. Consequently, the so-called "ice moulin" is actually the pothole formed by the stream erosion rather than the quaternary glaciation in Dabieshan area.