To provide more insight in the characteristics of the cutan in the S5 and its environmental significance, the mineralogy and geochemical composition of the cutan and matrix soil in the S5-1pedon at the Wugong section on the southern Chinese Loess Plateau (CLP) was investigated. The broad band between 400-800 cm-1 in the Raman spectrum of the dark cutan was attributed to the groups of Fe and Mn hydroxide/oxide. Enrichment of Mn and free iron (Fed) in the cutan verified the presence of Fe-Mn cutan in the S5-1 pedon which signified a periodic reduction under waterlogged conditions during the pedogenesis of S5-1 pedon on the southern CLP. The low permeability of S5-1 pedon as a result of lessivage of clay fraction characterized by high bulk density and low total porosity made the development of a seasonal perched water table possible. It provided favorable environmental conditions for the formation of Fe-Mn cutan. However, the low Mn/Fe ratio in the cutan suggested that the separation and accumulation of iron and manganese in the S5-1 pedon was not up to the level of typical Fe-Mn cutan from subtropical regions. Silicate minerals in the Fe-Mn cutan was was almost identical to the matrix soil. The difference of chemical weathering between the cutan and the matrix soil reflected by the Fed/Fet ratio was not epitomized by the mineralogical composition. While the S5-1 developed a subtropical climate prevailed on the southern CLP was further corroborated by the occurrence of Fe-Mn cutan.