根据新藏公路沿线实际观察资料和前人的最新成果，总结了新疆西昆仑库地蛇绿岩的构造特征、层序及岩石学特征；对库地蛇绿岩形成时代、原始构造环境等有争议的关键性问题进行了分析和探讨，得出了有关库地蛇绿岩的如下新结论：①形成时代为中元古代—晚元古代，同位素年龄值为大于１６６１．９～６９８．３６Ｍａ；②形成于缓慢扩张的条件下，且没有经历过俯冲消减作用；③岩浆来源为弱亏损的、非单一的上地幔源，并受到了陆壳物质的混染；④原始构造环境为弧后盆地—岛弧—弧间盆地，属过渡性构造环境 According to the actual observation data along the Xinsha highway and the latest achievements of predecessors, the paper summarizes the tectonic characteristics, sequence and petrological characteristics of the Kudi ophiolite in West Kunlun, Xinjiang. Based on the observation of the formation age and original tectonic environment of the Kudi ophiolite The key issues of the dispute are analyzed and discussed, and the following new conclusions about the Kudi ophiolite come into being: (1) the formation age is the Mesoproterozoic - the Late Proterozoic, the isotopic age value is more than 1661.9 ~ 698.36Ma; (2) formed under the conditions of slow expansion and had not experienced subduction; (3) the source of magma was weakly depleted and non-single upper mantle source and was contaminated by continental crust; (4) the original tectonic setting was a backarc basin - Island arc - arc basin, is a transitional tectonic environment