The invention relates to the technical field of communication optical cables, in particular to an ultra-miniature air-blowing optical cable. The ultra-miniature air-blowing optical cable comprises at least one loose tube, wherein a plurality of optical fibers are wrapped in the loose tube, and fiber paste is filled in the loose tube. An outer sheath sleeves the loose tube, a plurality of saw-toothed teeth are annularly arranged on the outer side wall of the outer sheath, and cross sections of the teeth are trapezoid. When the ultra-miniature air-blowing optical cable is used, small-diameter optical fibers and a special plastic are adopted to manufacture the loose tube, the outer diameter of the optical cable is decreased, the smooth and round outer sheath is changed to be a surface saw-toothed outer sheath, the micro-cable air-blowing performance is obviously improved, the optical fiber density in a communication pipeline is increased, a low-cost solution method is provided for expansion of a communication network and building of a high-capacity network, and additional attenuation of the paved optical fibers is also reduced obviously. The ultra-miniature air-blowing optical cable has the advantages of being simple in structure, reasonable in setting, low in manufacture cost and the like.