The invention relates to a method for producing conducting circuits, which belongs to the field of producing circuit polar plates. Steps of the invention comprise: using methods of dip-coating or rotating whirl coating or tape casting to coat macromolecule water solution whose concentration is 1-10wt%, drying and solidifying to form continuous films after coating, and spraying silver nitrate or chlorauric acid solution on the continuous films, wherein dissolvent is one component or multicomponent mixture of water, ethanol, ethylene alcohol, tetrahydrofuran or dimethyl sulfoxide, the concentration of solute is 5-60wt%, drying and solidifying to form conducting circuits patterns after coating, repeating above steps until obtaining the conducting circuits patterns which are needed, and processing the conducting circuits patterns which are obtained with high temperature. The method can obtain circuits with small line size, clear edges and good electric property and is suitable for variousspraying equipment.