The exact age determination of the early Pleistocene hominid remains is important for understanding the origin, dispersal and evolution of early human in China. This paper reviews various age estimatiom of Yuanmou Man in detail, then discusses the causes of its age disputes among lithostratigraphic, biostratigraphic and magnetostratigraphic studies. Many disciplines researches of the terrestrial sediments bearing rich mammalian fossils including hominid remains indicate that new tectonic activity, geography pattern, global cooling and drying change and extensively mammalian exchange are possible causes of age controversies of early human. Hence, We suggest that it is necessary to combine biostratigraphy, lithostratigraphy and magnetostratigraphy in order to obtain reliable age determination of the Yuanmou H. erectus and other mammalian.