Abstract: According current classification for resources/reserves of solid fuels and mineral commodities,according general requirements for solid mineral exploration and specifications of mineral exploration.the classification and delimitation and estimation for "low grade ore" resources have biggish dispute.the paper discuss classification and delimitation and estimation for "low grade ore" resources.it point out for consideration of the realities in China,improving current dtandards for resources/reserves of solid fuels and mineral commodities and specifications for mineral exploration or make a explanation by the authoritative organ, execute to classification disposal for the classification and delimitation and estimation for "low grade ore".