The invention relates to a method for electrochemical treatment of high-concentration organic wastewater via a three-dimensional electrode structure. The method comprises the following steps: adding composite minerals into an electrolytic reactor filled with high-concentration organic wastewater, adjusting a pH value to 5 to 10, then carrying out an electrolytic reaction under the conditions of aeration, stirring and fluidization, and then discharging clear water via a non-woven fabric self-forming dynamic membrane. The method provided by the invention exerts good degradation effect on refractory benzene-ring, heterocyclic, polycyclic, macromolecular and long-lasting organic matters which are difficult to degrade, has good adaptability to a variety of high-concentration organic wastewater, and has the substantial advantages of low power consumption, mild applicable pH value condition, no need for chemical agents, no production of iron-containing sludge, high treating efficiency, good controllability and the like.