The utility model relates to a reinforcing optical fiber unit, in particular to an optical unit with a reinforcing element, which is applied to the production and manufacture of a photoelectric composite cable, an optical fiber composite cable, a submarine photoelectric composite cable, an indoor photoelectric cable and other optical fiber units. The utility model comprises a plurality of optical fibers, optical filling ointment, an optical fiber protection layer, a fiber reinforcement layer and a reinforcement outer protection layer. The outer part of the optical fibers is wrapped with a the optical fiber protection layer, the optical fiber ointment is arranged among a plurality of optical fibers in the optical fiber protection layer, the outer part of the optical fiber protection layer is provided with the fiber reinforcement protection layer, and the outer part of the fiber reinforcement layer is provided with the reinforcement outer protection layer. The manufacture method is that the optical fibers are paid off by a constant tension pay-off device, after being bundles, the optical fibers are extruded out by a special extrusion machine to be a layer of optical fiber protection layer, and at the same time, the gaps of the optical fiber are filled with waterproof cream filler. The optical fiber protection layer is externally wound with a layer of high-strength non-metal fiber yarns, and the fiber yarns are externally extruded with a waterproof reinforcing protection layer, and thus the utility model is manufactured.