本文在滇黔桂三省21条剖面和82个地质点中采获了牙形刺的基础上,结合古地理和沉积学等方面的丰富资料以及其它古生物带来的大量信息,讨论了牙形刺的古生态。认为南盘江地区二迭纪牙形刺的属种组合和产出频度与沉积相的关系非常密切,并划分了三个牙形刺群落生境和一个无牙形刺的区域。为本区二迭纪沉积相的划分提供了一项新的标志。 Based on the abundant conodonts collected from 21 sections and 82 geological points in three provinces of Yunnan, Guizhou and Guangxi, and combining with the abundant information of palaeogeography and sedimentology and other information brought by other palaeontology, Ancient ecology. It is concluded that the genus assemblage and output frequency of the Permian conodonts in Nanpanjiang region are closely related to the sedimentary facies and are divided into three conodonts and one toothless conodont. It provided a new symbol for the division of sedimentary facies in the Second Permian in this area.