The utility model relates to a microgroove air-blow high-performance optical fiber unit, comprising optical fibers and an outer protective layer of the optical fibers, wherein cured resin is arranged among the optical fibers; and the surface of the outer protective layer is provided with axial microgrooves. As the optical fiber unit is provided with the axial microgrooves at the surface of the outer protective layer, when air-blow laying is performed, the contact area of the outer protective layer and the internal wall of a pipeline is small, the frictional force of the outer protective layer and the internal wall of the pipeline is reduced, so that the air-blow distance in the pipeline is increased, thereby meeting the requirements of long-distance air-blow laying, reducing connection points of the optical fiber and improving the utilization ratio of the optical fibers. In addition, as the cured resin is arranged among the optical fibers, the tensile property and the bending-resistant property of the optical fiber unit are improved.