The invention discloses a fracturing flow-back fluid treatment method. The treatment method comprises the following steps: pretreating: adding a certain amount of flocculant and emulsion breaker in the flow-back fluid to perform flocculation oil removing, and filtering; oxidizing: adding a certain amount of oxidant in the pre-treated effluent to perform the oxidation treatment; flocculating: adding a certain amount of flocculant and coagulant aid in the oxidized effluent to perform the flocculation, and filtering; and carrying out catalytic oxidization: adding rare precious metal iridium in the flocculated effluent as a catalyst, and then adding a certain amount of oxidant to perform the oxidation treatment, and filtering. The treatment method disclosed by the invention is simple in flow, low in operation cost and good in purifying effect.