In order to improve anti-bending property and keep the similar model field diameter of G 652， a single-mode， small-size， anti-bending fiber by designing the structure of the optical fiber preform with depressed cladding is proposed. The outer diameter of the fiber is 180 μm， the mode field diameter reaches 9.1 μm， the macrobending loss of the fiber at 1 550 nm is less than 0.4 dB and the long-term environmental performance is not larger than 0.03 dB/km. The cabling results show that the size of the cable can save 44% by using this optical fiber. The optical fiber cable could be used for crowded and narrow channels.