Novel water-blocking type full-dry optical cable structure and preparation method thereof

The invention provides a novel water-blocking type full-dry optical cable structure and a preparation method thereof, and relates to the technical field of communication optical cables. The optical cable structure comprises a loose tube and optical fiber arranged in the loose tube; an outer surface of the optical fiber is coated with a water-blocking coating, the water-blocking coating swells in water to form a filler, the loose tube is filled with the filler, and the filler is used for preventing the optical fiber from contacting with water; the water-blocking coating can swell in water to form the filler, and the filler can prevent water vapor from further permeating into the loose tube; on the one hand, the water blocking function is realized, the optical fiber is prevented from being corroded by water vapor, on the other hand, the space occupied by the water blocking coating is small compared with the traditionally filled water blocking material, the diameter of the loose tube canbe further compressed, th