It can be used as raw material for producing dysprosium metal, additive for glass, Nd-Fe-B permanent magnet, metal halogen lamp, magneto-optical memory material, yttrium iron or yttrium aluminium garnet, and atomic energy industry. Dysprosium oxide can also be used as an additive for Nd-Fe-B permanent magnets. The coercivity of Nd-Fe-B permanent magnets can be improved by adding about 2-3% Dysprosium. In the past, the demand for Dysprosium was not large, but with the increase of demand for Nd-Fe-B magnets, it became a necessary additive element, and the grade must be 95-99. About 9%, demand is also increasing rapidly. Dysprosium oxide is also used as raw material for producing dysprosium metal, additive for glass, NdFeB permanent magnet, metal halogen lamp, magneto-optical memory material, yttrium iron or yttrium aluminium garnet, and atomic energy industry.