Biomarkers are important organic geochemical fingerprints in studying paleoceanography and oceanic elemental cycles. Isotope compositions of biomarkers have significant meanings in investigating the paleoenvironmental reconstruction and carbon cycles in marine realm. Radiocarbon age of Long-Chain Alkenones （LCAs） has greatly scientific significance in constraining age models for establishing marine environmental changes， and studying oceanic carbon cycles at a molecular level， setting an important dimension for the future researches in compound-specific radiocarbon analysis. It thus is necessary to summarize systematically the approaches and implications of Alkenones-Specific Radiocarbon Analysis （ASRA）. The separation and purification technologies of LCAs， radiocarbon calculation methods， and blank correction are summarized here. The significant implications of ASRA are proposed as follows： ASRA ①indicates indirectly transportation and deposition processes on sedimentary organic matter， ② can be used to trace marine carbon pool， and ③ to improve chronology and paleoenvironmental indicators in the ocean. The foreground of the development and application of ASRA are also demonstrated. We suggest that systematically summarizing the technical characteristics and typical applications of ASRA is of significance in carbon cycles and paleoenvironment reconstruction in marine system， especially for marine biogeochemical studies in China marginal seas.