The invention relates to a flexible loose tube optical cable. The flexible loose tube optical fiber cable comprises an outer sheath and a cable core, wherein the cable core comprises loose tubes which sleeve optical fibers. The flexible loose tube optical fiber cable is characterized in that the loose tubes are flexible loose tubes; and the flexible loose tubes are made of a flexible material, wherein the flexible material can be TPEE, modified TPEE, TPU, PP or PE. The flexible loose tubes of the flexible loose tube optical fiber cable of the present invention not only have the mechanical and anticorrosive performance of a conventional loose tube, but also has excellent flexibility and bending performance; the loose tubes and the optical cable can reach a smaller bending radius without being fractured; the loose tubes can be matched with bending-resistant optical fibers, so that excellent bending resistance can be realized; and during the connection and winding for storage of the flexible loose tube optical cable, the flexible loose tubes can be directly adopted as sheaths of welded optical fibers, and can be bent with a small bending radius, and therefore, a space for the connection and winding for storage is small, the size of a required connector box is correspondingly small, the fiber storage rate of an optic cable router can be high. The flexible loose tube optical cable of the present invention does not tend to be damaged or fractured, and is convenient to use.