Full-dry type fireproof and rat-proof multi-core optical cable and manufacturing process thereof

The invention provides a full-dry type fireproof rat-proof multi-core optical cable which comprises a cable core composed of a plurality of optical units, and the outer side of the cable core is sequentially coated with an inner rat-proof layer, an inner protective layer, a fireproof layer, an outer sheath and an outer rat-proof layer. An optical unit comprises an optical fiber and a nylon tight wrapping layer on the outer side of the optical fiber. The inner rat-proof layer adopts a glass fiber yarn layer or a glass fiber belt layer; the fireproof layer adopts a mica tape layer; the outer sheath adopts an LSZH flame-retardant sheath layer. And the outer rat-proof layer adopts a nylon protective layer. The optical cable adopts a full-dry structure, is free of pollutants such as fiber pasteand factice, is convenient to construct, effectively solves the fireproof and rat-proof problems of the optical cable by combining multiple rat-proof structures and a fireproof structure, greatly improves the application rel