Optical fiber back-twisting machine

The utility model relates to the technical field of optical fiber manufacturing, in particular to an optical fiber back-twisting machine. The utility model provides an optical fiber back-twisting machine, which comprises a pay-off mechanism, a take-up mechanism, a back-twisting mechanism and a visual inspection mechanism, the pay-off mechanism and the take-up mechanism are arranged at an interval along a straight line, an optical fiber detection area for an optical fiber to naturally fall is formed between the pay-off mechanism and the take-up mechanism, and the visual inspection mechanism is arranged in the optical fiber detection area; the pay-off mechanism comprises a pay-off reel, a first driving device, an auxiliary traction device and a pay-off tension device, the take-up mechanism comprises a take-up reel and a second driving device, the back-twisting mechanism comprises a rotating table and a third driving device, and the visual detection mechanism comprises a first camera and a second camera. The uti