This study represents the chemostratigraphical work on limestones covering the Polygnathus xylus ensensis to lower varcus Zones at Liujing section, Guangxi, south China. In conjunction with biostratigraphic abservations,values/contents and trends of Ce/La, Ni/La, δ13Ccarb of unaltered limestones presented in this study provide the most powerful biochemostratigraphic tool in recognizing a series of anoxic events, Nickelevents and bioevents. Together with the large positive excursion of δ13Ccarb just on the Eifelian—Givetian boundary reflecting higher productivity and burial of organic matter, the essentially pronounced negative excursions near the boundary relating to the global kaákotomari event are well correlated by those of Volf Gorge and U dubu sedmi bratí in the Barrandian basin, Czech Republic. The paleogeographical and paleotectonic locations, the shallow sea to the south boundary of South China Massif, the dispersingboundary of paleoTethys were the oceanographic background of these events. The faults, rifts and volcanoes triggered Nickelevents, while uplifting movements and the fluctuating RSL were expressed by anoxic events. Nickelevents and anoxic events could lead to bioevents independently, while the conjunction of them made bioevents much heavier. Massextinction hadn't been inferred on a large scale because of the regional mechanism and extent of the events. The Nickelevents was of an oceanographic characteristic.