PEDOT:PSS fiber and preparation method thereof

The invention discloses a PEDOT:PSS fiber and a preparation method thereof. A wet spinning technology is adopted, low toxicity and low harm, green and environment-friendly mixed solution of inorganic salt, ethanol and water is adopted as coagulation bath, a PEDOT:PSS aqueous solution is taken as the main raw material, through a simple chemical treatment method, the PEDOT:PSS fiber with excellent electrical conductivity and mechanical properties can be prepared. The PEDOT:PSS fiber can be used directly as a lightweight flexible lead, also can be used for the electrode of a linear flexible capacitor, and can exhibit rapid voltage change response and high specific capacity. Compared with the prior art, the method provided by the invention has the prominent advantages of safety, green and environmental protection, and the fiber has large strength and good flexibility. At the same time, the equipment and method are simple, and can achieve large-scale production of PEDOT:PSS fiber with good mechanical properties, h