The invention relates to a method for electrolyzing acidic copper chloride, wherein the electrolyte is an acidic copper chloride aqueous solution with a copper ion concentration of 15-55 g/l, the oxidation reduction potential is 250-380 mv, and the negative electrode current density is 3.0-6.0 A/dm<2>. According to the present invention, by controlling the parameters of the electrolyte, the positive electrode current density and the negative electrode current density, the copper can be obtained through the electrolyzing without the ion membrane, and the copper obtained through the electrolyzing is attached to the outer surface of the negative electrode and is flattened into the block so as to provide the high recovery value.