Disclosed is a composition for a high strength loose tube type fiber optic cable with excellent flexibility and excellent impact resistance, which includes a polypropylene-polyethylene copolymer having a melt flow index (MFI) of 1.1 g/10 minutes to 3.0 g/10 minutes at 230° C. and a flexural modulus of 10,000 to 23,000 kg/cm2. A fiber optic cable including a loose tube formed with the composition for a high strength loose tube type fiber optic cable has excellent flexibility and impact resistance as well as excellent appearance.