The invention relates to the field of optical cable production, and discloses an optical cable production line capable of reducing optical cable production loss. The invention also discloses an optical cable production method capable of reducing the optical cable production loss. The optical cable production method includes the steps of pre-production and formal production. Pre-production comprises the steps that an optical cable is extruded by an extruder to perform production of the optical cable, the external diameter of the optical cable passing between a hot water tank and a cold water tank is measured, the external diameter of the optical cable passing through the cold water tank is measured, and the difference value of two measurement results acts as the correction value of the current production type of optical cable. Formal production includes the steps that the optical cable is extruded by the extruder to perform production of the optical cable, a wire diameter tester arranged between the hot water tank and the cold water tank measures the external diameter of the optical cable, the sum of the measured value and the correction value of the current production type of optical cable acts as the reading of the wire diameter tester, the wire diameter tester feeds back the reading to the extruder, and the extruder adjusts the extrusion output. Waste of raw materials in theoptical cable production process can be effectively reduced.