The invention discloses a method for processing heavy-metal complexed wastewater through a Fenton reinforced iron-chip internal electrolysis process. The method comprises the following steps of: filling an internal electrolysis filler into an iron-chip internal electrolysis reactor, then introducing the wastewater into the reactor after regulating the pH value of the wastewater to 1.5-3.5, adding a Na2SO4 solution, controlling dissolved oxygen to be not higher than 3.0mg / L, and controlling the flow speed of the introduced wastewater; then introducing the discharged water of the internal electrolysis reactor into a Fenton reactor, maintaining the ferrous concentration in the water to be 300-750mg / L, adding H2O2 according to the mass concentration ratio of H2O2 to Fe2+ of 2.0-7.0, and sufficiently reacting for 60-120 minutes under the condition of controlling the pH value to be 2.5-5.5; and regulating the pH value of the discharged water to 9.0-10.0, standing and settling, and separating mud from the water. According to the method disclosed by the invention, the operation is simple and convenient, the sewage biodegradability can be markedly improved, the difficulty and the organic load of subsequent processing are greatly reduced, and the cost is saved.