Abstract：Based on a comparative study of major international classification proposals for mineral resources and reserves, this paper sums up current international practice and rules in this aspect. Based on an analysis of the problems and defects of the United Nations Framework Classification for Energy and Mineral Resources, the author points out the deviations of the National Standards on Solid Mineral Resources/Reserves Classification from the internationally recognized practice, with a discussion on the problems encountered during the utilization. Suggestions on the revision and perfection of China's classification standards of mineral resources and reserves are also put forward in this paper.