The materials filled in the cave of conglomerate, part of cemented materials of sandstone and fresh rocks of sandstone were analyzed by magnetic susceptibility values, carbon 14, magnetic iron mineral content and ¹⁸O isotope. It is concluded that the magnetic susceptibility values of the Jiangbei conglomerate in Fuzhong of Beibei are consistent with the content of magnetic iron mineral. The characteristics of the magnetic susceptibility curve are similar to those of the oxygen isotope curve. The magnetic susceptibility of Jiangbei conglomerate in Fuzhong of Beibei can indicate the ancient climate change: the last stage of last pleistocene epoch experienced two relatively short warm-humid periods and three comparatively long dry-cool periods, but in the dry-cool periods there exists very short warm-humid time.