寒武纪早期是生物大辐射时期，该时期不同板块生物面貌的差异大、生物辐射是否同步是环境差异造成的还是古地理分布造成的，都有待进一步的研究。此外华南地块的古地理位置在古大陆重建中长期以来存有争议。而古生物地理学的研究在古地理重建中能够起到约束作用。因此，本课题拟以寒武纪早期三叶虫动物、小壳动物和古杯动物三个门类为研究对象，采用聚类分析、分异度-生态类型组成和特殊属种的分布的方法开展各门类四个期的古生物地理研究，建立起大区-区-省-地区的四级生物地理区系，根据所得的生物地理区系进行古地理分析，并结合最新的古地磁及岩相古地理研究成果，以期为单位建立华南寒武纪早期定量古生物地理演化规律，为深入探讨寒武纪早期生物的起源、迁移、辐射模式提供古生物地理依据，为正确认识华南地块在冈瓦纳大陆形成过程中的动态位置如何，与相邻地块之间的构造关系如何提供古生物地理研究证据。

Cambrian explosion occured the early Cambrian, biological furthers were different in different blocks during the period the biological radiation in different blocks was synchronous or not. This phenomenon was caused by Environmental differences or palaeobiogeographic distribution. It need further study. Moreover, Early Palaeozoic palaeoposition of South China Block is uncertain and controversial. Because palaeobiogeographic studies can provide valuable const raints on palaeogeographic reconstructions. This subject study the quantitutive palaeobiogeography of early Cambrian trilobites, small shelly fossils and archaeocyaths, we apply cluster analysis, and analysis of taxonomic diversity gradients and endemism to four time intervals(i.e.Fortunian, Stage2, Stage3, Stage4) in all categories paleobiogeographic study, and establish a Region - Realm - Province - District of the four levels of paleobiogeographic reginons, according to the paleobiogeographic regions, and combining with the latest paleomagnetism and facies paleogeography research, We establish the paleobiogeographic evolution in South China during early Cambrian as stages.and make clear how the paleoposition of South China Block changed during early Cambrian. this study can provide paleobiogeographic evidence for further research on the posotion of the South China Block in the Gondwana and the continental af?nity of South China with other Blocks, such as East Gondwana, Laurentia, Siberia, Baltic and so on.