Abstract: Through the introduction and analysis of methods and results of quantitative evaluation of supply risk of major mineral elements by British Geological Survey in 2011and 2012,we pointed out that the second evaluation's results had significant changes compared to the first due to the improvement of method, calculating different indicators based on multi-source data,improving indictor system constantly,updating basic data timely and measuring management indicator from political stability are the greatest commonalities and highlights of the two evaluations,but there are also some disadvantages,such as indicator weight.