South China Block was mostly located within middlelow latitude belt during the Paleozoic time. Reef types with temporal and spatial differentiations are abundant in distribution from diverse carbonate facies. The community structures basically matched the global macroevolutionary patterns especially the essential changeover from the Cambrian Fauna and Paleozoic Fauna. The origin, radiation, extinction and recovery events are enhanced as the mechanisms and historically configured profiles of reef successions. Archaeocyaths-microbial reefs of the Early Cambrian and onward microbial reefs extended limitedly. Bryozoanal,microbial and Calathium-lithistid sponge reefs diversified in ecological components at the EarlyMiddle Ordovician. Coral-stromatoporoidalgal and microbial reefs of the Late Ordovician reefs occurred from the limited platform as well as its margin of the Zhe-Gan border region. Growth of the Llandovery reef in the Yangtze Platform was frequently covered by terrigenous debris. Ecological associations of the reefs were relatively stable with duration from the Middle Devonian to early Late Devonian. Microbial, bryozoan-coral reefs from the Famennian, Late Devonian to Mississippian, bryozoan-sponge-algal reefs of the Pennsylvanian to the Early Permian, coral-bryozoan-sponge-algal reefs of the Middle-Late Permian show dramatic replacement of the reef-building biota triggered by mass extinction events. Regional tectonic movements and sea level fluctuations significantly restricted temporal and spatial distributions of the reefs. High sea-level of the MiddleLate Ordovician and uplifting of the whole Yangtze region from the Llandovery to the early Early Devonian shrank habitation realms of the reefs palaeogeographically. Long-term greenhouse of the Devonian promoted the development of the reef-building. However, cool marine water condition constrained the reef magnitude from the Pennsylvanian to the Early Permian. Carbonates are dominated in value throughout the Palaeozoic sequences of the South China Block indicating that the marine water was mostly maintained with high clarity. Terrigenous debris was viewed as the key roles for the constraining of reef forming within specified time intervals. Sea-level changes are limited in magnitude and thus more likely considered as impact factors for reef growth vertically and migrations horizontally. Furthermore, subsidence of the basement with sedimentary compensation was generally balanced in carbonate depositional regions, and shallow marine facies were commonly spread out with variation in magnitudes. Depth changes of marine floor in some regions aren't enhanced in controlling of reef growth of the whole block. Large-scale dolostones as proxies of the abnormality in particular episodes remarkably excluded reefs.