The invention discloses a nano-magnetic-energy face/eye mask and a preparation method thereof; the face/eye mask is prepared by the following raw materials in percentage by weight: 0.2-15% of functional cosmetic additive, 1-5% of nano-magnetic powder, 2-10% of hydrogenated wheat germ oil, 1-3% of agar and 67-95.8% of water. When the face/eye mask containing nano-magnetic powder with ultrafine grain diameter is applied to face or below eyes, the magnetic powder can provide magnetic energy for skin for magnetic radiation, helps to promote blood circulation of the face and the eyes, activates skin cells and promotes metabolism of the skin cells, thus delaying skin aging.