Composite yarn twisting device

The utility model discloses a composite yarn twisting device in the technical field of yarn twisting, which comprises a whole device, a yarn feeding roller and a take-up roller, the yarn feeding roller and the take-up roller are respectively arranged in the whole device, an air outlet is arranged in the whole device close to the upper part of the yarn feeding roller and the take-up roller, and the inner wall of the top of the whole device is fixedly connected with a first fan. The output end of the first fan is communicated with one end of the air outlet, an air suction opening is formed in the end, away from the air outlet, of the interior of the whole device, a second fan is fixedly connected to the inner wall of the bottom of the whole device, and the input end of the second fan is communicated with one end of the air suction opening. Through mutual cooperation of the first draught fan, the exhaust outlet, the second draught fan, the exhaust inlet, the exhaust pipe, the recycling box, the air passing chamb