Thermoelectric fabric and preparation method thereof

The invention relates to a thermoelectric fabric and a preparation method thereof, and belongs to the technical field of thermoelectric fabrics. The preparation method provided by the invention comprises the following steps: S1, respectively dipping a matrix yarn in a single-walled carbon nanotube aqueous slurry and a multi-walled carbon nanotube/aqueous polyurethane composite slurry through a dip coating method, and drying to obtain a carbon nanotube composite yarn; s2, winding a carbon nanotube composite yarn on a template, coating nodes on two sides with silver paste, respectively coating the surface of the carbon nanotube composite yarn which is not coated with the silver paste with poly (3, 4-ethylenedioxythiophene), a polystyrene sulfonic acid solution and a polyethyleneimine alcohol solution, and drying to obtain a thermoelectric yarn with a PN interval structure; s3, the thermoelectric yarn with the PN interval structure is implanted into the three-dimensional warp-knitted spacer fabric through an emb