Oceanic current plays a key role in controlling the redistribution of global heat and moisture, which may have effect on climatic change finally. It′s urgent to understand the mechanism of ocean current evolution, which may be related to alternation between warm and cold weather, and to better predict the trend of present climatic change. It has been confirmed that the Nd isotopic composition is an effective proxy for studying ocean current evolution, and has attracted many attentions. This paper interprets why the Nd isotopic composition could be used as a proxy to reconstruct paleocirculation through illustrating the characteristic of Nd. Besides, some materials enriched in Nd and methods for studying will be explained in detail.