The invention relates to an ultralow loss optical fiber production system and a technology used for production. The ultralow loss optical fiber production system comprises a wire drawing device, an annealing device, a coating curing device, and a control unit A. The wire drawing device is a wire drawing furnace, which, from top to bottom, comprises a furnace top gas disc, a wire drawing furnace body, and a lower end annealing tube, which are in a coaxial arrangement. The annealing device is a heat preservation annealing furnace, and the coating curing device comprises a coating device and an ultraviolet light curing furnace, which are sequentially arranged. When the ultralow loss optical fiber is disposed in the production system, the optical fiber passes through the wire drawing device, the annealing device, the coating curing device, and the control unit A. The ultralow loss optical fiber production system and the technology used for the production are advantageous in that the wire drawing furnace top gas disc is provided with a plurality of gas inlets, and the original single heating element of the heat preservation annealing furnace is changed into an upper heating element and a lower heating element, which are independent from each other, and are controlled respectively by independent power supplies; the connection with the wire drawing furnace is realized by a data line, and then remote control is realized; the ultraviolet light curing furnace is used for on-line monitoring of a gas exhaust condition, and is used to adjust the gas exhaust condition automatically.