Abstract: The exploration progress，characteristics and typical mineral composition of ore deposits and prospecting marks of Tantalum-Niobium rare metals mineral resouces in China are summarized systemically.The conclusions are concluded as following：①As the new strategy of mineral resources，the Tantalum-Niobium rare metals in China cannot meet domestic demand.During the period of "the thirteenth five-year plan"，the exploration efforts on rare metallic minerals will be strengthened.②The Tantalum-Niobium rare metal deposits have the characteristics of relatively concentrated distribution，less single deposit，more associated ore deposits，low grade，large reserves and complicated composition.③Different type of Tantalum-Niobium ore deposits in different regions has different prospecting marks.But almost of the Tantalum-Niobium rare metal deposits are closely related with albitization，most deposits have radioactive anomaly，and small intrusions have great significance in prospecting.④In the exploration of Tantalum-Niobium rare metal mineral，it is necessary to strengthen the composition investigation，make comprehensive exploration，and attach great importance to comprehensive utilization and economic evaluation.The above conclusions are helpful to avoid the blindness of geological prospecting and reduce the useless ore.Besides that，it can also have certain reference value for carrying out the "three thin（elements of rare,rare earth and rare dispersed" mineral investigation.

Key words: Rare metal deposits, Characteristics of endowment, Mineral composition, Prospecting marks, Prospecting revelation