The invention belongs to the field of biomedical materials and discloses application of miR-141 in the preparing of anti-osteoporosis and bone-resorption-inhibiting preparations. Experiments prove that the miR-141 inhibits the differentiation process of osteoclasts by regulating the expression of genes related to osteoclast differentiation. The miR-141 can inhibit bone mass loss and osteoporosis, so that the miR-141 can be used for preparing the various biomedical anti-osteoporosis and bone-resorption-inhibiting preparations.