The Neoproterozoic Glaciation (Nanhua) period (720 ~ 635 Ma) is globally recognized for its significant glaciation events, which had a profound impact on the early evolution of life. It is widely understood as a critical phase, acting as both a “filter” and a “bottleneck” in the evolutionary process. However, when comparing biological evolution before and after this glacial period, it becomes evident that the process was not completely disrupted. This indicates the existence of biological refuges that provided protection for life during the glaciation period. In the Shennongjia area, situated on the northern margin of the Yangtze Block in South China, an exceptional macroscopic algal biota known as the Songluo biota has been discovered within the Nantuo Formation. To investigate the relationship between paleoenvironment and biological survival against the backdrop of global glaciation, this study conducts a comparative analysis of element geochemistry between fossil shale intercalations and non- fossil mudstone intercalations from the Nantuo Formation at the Songluo section and Qinglinkou section on the northern margin of the Yangtze Block. The results of this study demonstrate that the Songluo biota thrived at the end of the deglaciation period, characterized by normal ocean salinity and suboxic conditions, along with a warm and humid climate in the region. These favorable environmental circumstances likely facilitated the endurance and preservation of fossils for the “Songluo biota” amidst the extreme glaciations. Furthermore, this study provides evidence of the presence of sanctuaries suitable for complex life during the Neoproterozoic extreme glaciation.