Rare earth elements （REEs）consist of the 15 lanthanide elements with atomic numbers (Z) 57-71. There are a lot of rare earth resources (RERs) storage in the earth, but the distribution of RERs is extremely unbalanced. There exist huge differences of RERs storage among each country. According to the American Federal Bureau of Investigation (AFBI), data showed that there are abundant rare earth resources in China and at the end of 2012 it accounted for 50% of the total reserves of the world. Situations of RERs storage of other major countries is showed in table 1. According to the white paper "China's rare earth situation and policy" decreed by China's state council on June 6, 2012, China's RERs accounted for only 23% of the world's total reserves of RERs. Data released by AFBI in 2009, showed that China reserves 36 million tons of RERs, accounts for about 36% of the world's total 99 million tons RERs. To this data, the Ministry of Land and Resources of China carried out a special inspection, their result showed that storage of RERs in China was only 18.59 million tons, which accounted for about 23% percentage of the world's total reserves of 81.09 million tons. Since 2010, China has not proven new rare earth mine in great quantities, but the data investigated by U.S. Geological Survey is rising year by year, so RERs storage data in 2009 is generally believed and more representative.