The invention is related to a continuous system for coating carbon fibre materials and a device developed to carry out the method. The coating of carbon fibre with both an electrochemical method following the polymerization (polyethylenedioxythiophene, polypyrrole, polythiophene, polyaniline and derivates thereof) of the monomer of conductive polymer and coating with an insulating sizing material (thickening material) is carried out in a single step.