A new biomimetic route for the synthesis of a conducting polyaniline (Pani)/lignosulfonate (LGS) complex is presented. Iron(II) tetrasulfophthalocyanine (FeTSPc) is used to polymerize aniline in the presence of a natural polyelectrolytes template, LGS. The results show that FeTSPc is an effective catalyst in this case, and the synthesis is simple. The conditions are mild in that the polymerization may be carried out in lower pH (1.0-4.0) buffered solution. The optimal pH value is 1.5. By varying concentrations of aniline, LGS, and H2O2, the favorable conditions for the production of Pani were determined. UV-vis absorption, FTIR, elemental analysis, conductivity, cyclic voltammetry, and thermogravimetric analysis studies all confirm the thermally stable and electroactive form of Pani.