The invention provides an enhanced fiber unit and a manufacturing method thereof, relating to a fiber unit with an enhanced component and the manufacturing method thereof, and being suitable for production and manufacturing of various photoelectricity compound cables, optical fiber composite cables, seabed photoelectricity compound cables, indoor type optical cables and the like. The fiber unit comprises a plurality of optical fibers, optical fiber filling oil paste, an optical fiber protective layer, a fiber reinforced layer and a reinforced external sheath, wherein the outside of the optical fiber is coated with the optical fiber protective layer; the optical fiber filling oil paste is filled among a plurality of optical fibers in the optical fiber protective layer; the fiber reinforced layer is arranged outside the optical fiber protective layer; and the reinforced external sheath is arranged outside the fiber reinforced layer. The manufacturing method comprises the following steps: emitting the optical fiber from a constant tension dereeler, after forming beams, a layer of optical fiber protective layer is extruded out through a specific extruder; filling water repellent filler between the optical fibers when the optical fiber protective layer is extruded; and winding a layer of nonmetal fiber yarn with high strength outside the optical fiber protective layer, and extruding a layer of waterproof reinforced external sheath outside the fiber yarn, and obtaining a finished product.