Optical fiber loop with magnetic shielding function and preparation method of optical fiber loop

The invention discloses a magnetic shielding optical fiber loop and a preparation method thereof, and the method comprises the following steps: S1, mixing an adhesive and a filler to form a compound according to a mass ratio of the adhesive to the filler of 10: 1-10: 8; wherein the filler is selected from any one or combination of more of metal filler and carbon-based filler; s2, providing a mold, connecting the mold with a centrifugal machine, fixing the optical fiber ring in the mold, filling a gap between the mold and the optical fiber ring with the compound, and starting the centrifugal machine for centrifugal enrichment; under the action of centrifugal force, the filler is enriched on the edge of the inner side of the mold, the surface of the filler is wrapped with a layer of adhesive film, and the filler and the adhesive film jointly form a magnetic shielding layer; the adhesive outside the magnetic shielding layer forms an adhesive layer between the magnetic shielding layer and the optical fiber ring;