The invention discloses a method for preparing electrically conductive hydrogel. The method includes steps of (1), uniformly dispersing hydrophilic monomers or hydrophilic polymers in hydrochloric acid aqueous solution to obtain stable dispersion liquid, adding electrically conductive monomers and metal alkoxide into the dispersion liquid and uniformly stirring the electrically conductive monomers, the metal alkoxide and the dispersion liquid; (2), adding initiators and catalysts into mixed liquid obtained at the step (1), uniformly mixing the initiators, the catalysts and the mixed liquid with one another and then carrying out reaction at the temperature ranging from -20 DEG C to 50 DEG C for 24-72 hours. The electrically conductive hydrogel can be obtained after the reaction is completely carried out. The mass of the electrically conductive monomers is 1-20% of the mass of the hydrochloric acid aqueous solution, is 20-100% of the mass of the metal alkoxide and is 0.2-85% of the massof the hydrophilic monomers or the hydrophilic polymers. The mass of the initiators is 0.5-5% of the mass of the electrically conductive monomers, and the mass of the catalysts is 0.01-5% of the massof the hydrophilic monomers. Compared with existing methods, the method has the advantages that the electrically conductive hydrogel prepared by the aid of the method is excellent in mechanical property and electrochemical performance and can be prepared at one step, and the method includes simple processes for preparing the electrically conductive hydrogel and is low in raw material usage.