The Early Triassic is a critical period in earth history, representing the ecosystem reconstruction and recovery after the endPermian biotic crisis. As a result of recent discoveries about a series of unusual environmental and evolutionary events, the research of the Early Triassic has become a focus topic in the geological fields. Variations in the carbon isotopic compositions of marine carbonate record the fluctuation of carbon cycle, and give information about ecosystem function and environmental change through the transitional period. The new carbon isotope data indicate that the P/T δ¹³C decline was just a start of a series of large fluctuations that continued throughout the Early Triassic before the early Middle Triassic. The high frequency and large amplitude of the δ¹³C excursions demonstrate that the catastrophic mechanisms proposed in the past become less attractive to explain the Early Triassic carbon isotopic record as a whole. The lack of comparability of δ¹³C curve globally and the genesis for the usually 8‰ positive shift are the problems worthy   further consideration.