Abstract: Based on the new results of high-precision and integrated research of biological-, sequence-, chemo- and magnetic stratigraphy from the Xiaoyangqiao section in China and its detailed comparison with the Green Point GSSP section, the signs of the division and correlation of the base of Ordovician defined in the Green Point section of Canada was further revised. It is suggested that (1)The equivalent boundary to the global standard Ordovician base defined in the Green Point GSSP is located in 19.9 m above the laminated limestone (i.e. the bottom of the BD-24 bed) underlying the characteristic massive stromatolitic limestone of the Xiaoyangqiao section, i.e., the upper part of the Cordylodus intermedius conodont zone, 1 m below the level with the earliest planktonic graptolite Rhabdinopora proparabola, and 1.5 m below the base of the Cordylodus lindstromi Zone; (2) the Cambrian-Ordovician boundary defined is located between two global sea level rise and fall events, namely the global Basal House lowstand and the Acerocare lowstand event; (3) the Early Ordovician largest δ ¹³C_carb isotope positive peak appears at the bottom of the Rhabdinopora parabola graptolite zone; (4) The significant δ ¹³C_carb carbon isotope positive shift, known as Hirsutodontus simplex peak (= HSS), and the rare earth element (REE) anomaly recorded inside the Cordylodus intermedius Zone, are directly located below the Cambrian-Ordovician boundary of these two sections. All of these events record above could be used as proxies for identification and subdivision and correlation of the Cambrian-Ordovician boundary between different continents and facies worldwide.